diff --git a/lib/src/app.dart b/lib/src/app.dart
index 29fedf1..7b261c9 100644
--- a/lib/src/app.dart
+++ b/lib/src/app.dart
@@ -1,10 +1,6 @@
 import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
 
 import 'package:tabnews/src/constants.dart';
-import 'package:tabnews/src/providers/content.dart';
-import 'package:tabnews/src/providers/favorites.dart';
-import 'package:tabnews/src/providers/user.dart';
 import 'package:tabnews/src/ui/layouts/tab.dart';
 
 class App extends StatelessWidget {
@@ -12,46 +8,30 @@ class App extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return MultiProvider(
-      providers: [
-        ChangeNotifierProvider(
-          lazy: false,
-          create: (_) => UserProvider(),
+    return MaterialApp(
+      title: 'TabNews',
+      debugShowCheckedModeBanner: false,
+      darkTheme: ThemeData.dark().copyWith(
+        primaryColor: Colors.white,
+        colorScheme: const ColorScheme.light(
+          primary: Colors.white60,
+          secondary: Colors.white60,
         ),
-        ChangeNotifierProvider(
-          lazy: false,
-          create: (_) => ContentProvider(),
+        textSelectionTheme: TextSelectionThemeData(
+          selectionColor: Colors.grey.shade700,
         ),
-        ChangeNotifierProvider(
-          lazy: false,
-          create: (_) => FavoritesProvider(),
-        ),
-      ],
-      child: MaterialApp(
-        title: 'TabNews',
-        debugShowCheckedModeBanner: false,
-        darkTheme: ThemeData.dark().copyWith(
-          primaryColor: Colors.white,
-          colorScheme: const ColorScheme.light(
-            primary: Colors.white60,
-            secondary: Colors.white60,
-          ),
-          textSelectionTheme: TextSelectionThemeData(
-            selectionColor: Colors.grey.shade700,
-          ),
+      ),
+      theme: ThemeData(
+        primaryColor: Colors.black,
+        colorScheme: const ColorScheme.light(
+          primary: AppColors.primaryColor,
+          secondary: AppColors.primaryColor,
         ),
-        theme: ThemeData(
-          primaryColor: Colors.black,
-          colorScheme: const ColorScheme.light(
-            primary: AppColors.primaryColor,
-            secondary: AppColors.primaryColor,
-          ),
-          textSelectionTheme: TextSelectionThemeData(
-            selectionColor: Colors.grey.shade300,
-          ),
+        textSelectionTheme: TextSelectionThemeData(
+          selectionColor: Colors.grey.shade300,
         ),
-        home: const TabLayout(),
       ),
+      home: const TabLayout(),
     );
   }
 }
diff --git a/lib/src/controllers/app.dart b/lib/src/controllers/app.dart
new file mode 100644
index 0000000..6c4fc36
--- /dev/null
+++ b/lib/src/controllers/app.dart
@@ -0,0 +1,42 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:tabnews/src/constants.dart';
+import 'package:tabnews/src/models/user.dart';
+import 'package:tabnews/src/preferences.dart';
+
+class AppController {
+  static final AppController _singleton = AppController._internal();
+
+  factory AppController() {
+    return _singleton;
+  }
+
+  AppController._internal();
+
+  static const String _loggedKey = AppConstants.loggedInKey;
+  static const String _authKey = AppConstants.authKey;
+  static const String _userKey = AppConstants.userKey;
+
+  static ValueNotifier<bool> isLoggedIn = ValueNotifier(
+    Preferences.getBool(AppController._loggedKey) ?? false,
+  );
+  static ValueNotifier<String> auth = ValueNotifier(
+    Preferences.getString(AppController._authKey) ?? '',
+  );
+  static ValueNotifier<User> user = ValueNotifier(
+    AppController._getLoggedUser(),
+  );
+
+  static User _getLoggedUser() {
+    String pref = Preferences.getString(_userKey) ?? '';
+
+    if (pref.isNotEmpty) {
+      User user = User.fromJson(jsonDecode(pref));
+
+      return user;
+    }
+
+    return User.fromJson({});
+  }
+}
diff --git a/lib/src/controllers/auth.dart b/lib/src/controllers/auth.dart
new file mode 100644
index 0000000..11d290d
--- /dev/null
+++ b/lib/src/controllers/auth.dart
@@ -0,0 +1,111 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+
+import 'package:tabnews/src/constants.dart';
+import 'package:tabnews/src/controllers/app.dart';
+import 'package:tabnews/src/interfaces/view_action.dart';
+import 'package:tabnews/src/models/user.dart';
+import 'package:tabnews/src/preferences.dart';
+import 'package:tabnews/src/services/auth.dart';
+import 'package:tabnews/src/services/http_response.dart';
+
+class AuthController {
+  final ViewAction _view;
+  final AuthService _authService = AuthService();
+
+  final String _loggedKey = AppConstants.loggedInKey;
+  final String _authKey = AppConstants.authKey;
+  final String _userKey = AppConstants.userKey;
+
+  final ValueNotifier<bool> _isLoading = ValueNotifier(false);
+  ValueNotifier<bool> get isLoading => _isLoading;
+
+  final ValueNotifier<bool> _isRegister = ValueNotifier(false);
+  ValueNotifier<bool> get isRegister => _isRegister;
+
+  AuthController(this._view);
+
+  void login(String email, String password) async {
+    if (email.isEmpty || password.isEmpty) {
+      _view.onError(message: 'É necessário preencher todos os campos!');
+
+      return;
+    }
+
+    _setLoading(true);
+    final HttpResponse auth = await _authService.postLogin(email, password);
+
+    if (auth.ok) {
+      var user = await _authService.fetchUser(auth.data['token']);
+
+      Preferences.setString(_authKey, auth.data['token']);
+      Preferences.setString(_userKey, jsonEncode(user.data));
+      Preferences.setBool(_loggedKey, true);
+
+      _setLoggedIn(true);
+      _setToken(auth.data['token']);
+      _setUser(User.fromJson(user.data));
+
+      _view.onSuccess();
+    } else {
+      _view.onError(message: auth.message);
+    }
+
+    _setLoading(false);
+  }
+
+  void logout() {
+    Preferences.setString(_authKey, '');
+    Preferences.setString(_userKey, '');
+    Preferences.setBool(_loggedKey, false);
+    _setLoggedIn(false);
+    _setToken('');
+    _setUser(User());
+  }
+
+  void register(String username, String email, String password) async {
+    if (username.isEmpty || email.isEmpty || password.isEmpty) {
+      _view.onError(message: 'É necessário preencher todos os campos!');
+
+      return;
+    }
+
+    _setLoading(true);
+    final HttpResponse register = await _authService.postRegister(
+      username,
+      email,
+      password,
+    );
+
+    if (register.ok) {
+      _setRegister(true);
+
+      _view.onSuccess();
+    } else {
+      _view.onError(message: register.message);
+    }
+
+    _setLoading(false);
+  }
+
+  void _setLoading(bool value) {
+    _isLoading.value = value;
+  }
+
+  void _setRegister(bool value) {
+    _isRegister.value = value;
+  }
+
+  void _setLoggedIn(bool value) {
+    AppController.isLoggedIn.value = value;
+  }
+
+  void _setToken(String value) {
+    AppController.auth.value = value;
+  }
+
+  void _setUser(User value) {
+    AppController.user.value = value;
+  }
+}
diff --git a/lib/src/controllers/content.dart b/lib/src/controllers/content.dart
new file mode 100644
index 0000000..7d39fea
--- /dev/null
+++ b/lib/src/controllers/content.dart
@@ -0,0 +1,44 @@
+import 'package:flutter/material.dart';
+
+import 'package:tabnews/src/controllers/app.dart';
+import 'package:tabnews/src/interfaces/view_action.dart';
+import 'package:tabnews/src/services/content.dart';
+import 'package:tabnews/src/services/http_response.dart';
+
+class ContentController {
+  final ViewAction _view;
+  final ContentService _contentService = ContentService();
+
+  final ValueNotifier<bool> _isLoading = ValueNotifier(false);
+  ValueNotifier<bool> get isLoading => _isLoading;
+
+  ContentController(this._view);
+
+  void create(String title, String body, String source) async {
+    if (title.isEmpty || body.isEmpty) {
+      _view.onError(message: 'É necessário preencher os campos obrigatórios!');
+
+      return;
+    }
+
+    _setLoading(true);
+    final HttpResponse content = await _contentService.postContent(
+      AppController.auth.value,
+      title,
+      body,
+      source,
+    );
+
+    if (content.ok) {
+      _view.onSuccess();
+    } else {
+      _view.onError(message: content.message);
+    }
+
+    _setLoading(false);
+  }
+
+  void _setLoading(bool value) {
+    _isLoading.value = value;
+  }
+}
diff --git a/lib/src/controllers/favorites.dart b/lib/src/controllers/favorites.dart
new file mode 100644
index 0000000..7ef818a
--- /dev/null
+++ b/lib/src/controllers/favorites.dart
@@ -0,0 +1,64 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+
+import 'package:tabnews/src/models/content.dart';
+import 'package:tabnews/src/preferences.dart';
+
+class FavoritesController {
+  static final FavoritesController _singleton = FavoritesController._internal();
+
+  factory FavoritesController() {
+    return _singleton;
+  }
+
+  FavoritesController._internal();
+
+  final ValueNotifier<bool> _isLoading = ValueNotifier(false);
+  ValueNotifier<bool> get isLoading => _isLoading;
+
+  final ValueNotifier<List<Content>> _favorites = ValueNotifier(
+    FavoritesController._getSavedFavorites(),
+  );
+  ValueNotifier<List<Content>> get favorites => _favorites;
+
+  static List<Content> _getSavedFavorites() {
+    String pref = Preferences.getString('favorites') ?? '';
+
+    if (pref.isNotEmpty) {
+      List<dynamic> contents = jsonDecode(pref);
+
+      return contents.map<Content>((e) => Content.fromJson(e)).toList();
+    }
+
+    return [];
+  }
+
+  void toggle(Content content) async {
+    _setLoading(true);
+    Content copyContent = content;
+
+    if (_favorites.value.isNotEmpty) {
+      if (_favorites.value
+          .where((element) => element.id == content.id)
+          .isNotEmpty) {
+        _favorites.value = List.from(_favorites.value)
+          ..removeWhere((element) => element.id == content.id);
+      } else {
+        copyContent.body = null;
+        _favorites.value = List.from(_favorites.value)..add(copyContent);
+      }
+    } else {
+      copyContent.body = null;
+      _favorites.value = List.from(_favorites.value)..add(copyContent);
+    }
+
+    Preferences.setString('favorites', jsonEncode(_favorites.value));
+
+    _setLoading(false);
+  }
+
+  void _setLoading(bool value) {
+    _isLoading.value = value;
+  }
+}
diff --git a/lib/src/controllers/user.dart b/lib/src/controllers/user.dart
new file mode 100644
index 0000000..48c040f
--- /dev/null
+++ b/lib/src/controllers/user.dart
@@ -0,0 +1,72 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+
+import 'package:tabnews/src/constants.dart';
+import 'package:tabnews/src/controllers/app.dart';
+import 'package:tabnews/src/interfaces/view_action.dart';
+import 'package:tabnews/src/models/user.dart';
+import 'package:tabnews/src/preferences.dart';
+import 'package:tabnews/src/services/auth.dart';
+import 'package:tabnews/src/services/http_response.dart';
+
+class UserController {
+  final ViewAction _view;
+  final AuthService _authService = AuthService();
+
+  final String _userKey = AppConstants.userKey;
+
+  final ValueNotifier<bool> _isLoading = ValueNotifier(false);
+  ValueNotifier<bool> get isLoading => _isLoading;
+
+  final ValueNotifier<bool> _notifications = ValueNotifier(
+    AppController.user.value.notifications ?? true,
+  );
+  ValueNotifier<bool> get notification => _notifications;
+
+  UserController(this._view);
+
+  void setNotifications(bool? value) {
+    _notifications.value = value ?? true;
+  }
+
+  void update(String username, String email) async {
+    if (username.isEmpty || email.isEmpty) {
+      _view.onError(message: 'É necessário preencher todos os campos!');
+
+      return;
+    }
+
+    _setLoading(true);
+    final HttpResponse user = await _authService.updateUser(
+      token: AppController.auth.value,
+      username: AppController.user.value.username,
+      newUsername:
+          AppController.user.value.username != username ? username : '',
+      newEmail: AppController.user.value.email != email ? email : '',
+      newNotifications: _notifications.value,
+    );
+
+    if (user.ok) {
+      var user = await _authService.fetchUser(AppController.auth.value);
+
+      Preferences.setString(_userKey, jsonEncode(user.data));
+
+      _setUser(User.fromJson(user.data));
+
+      _view.onSuccess();
+    } else {
+      _view.onError(message: user.message);
+    }
+
+    _setLoading(false);
+  }
+
+  void _setLoading(bool value) {
+    _isLoading.value = value;
+  }
+
+  void _setUser(User value) {
+    AppController.user.value = value;
+  }
+}
diff --git a/lib/src/interfaces/view_action.dart b/lib/src/interfaces/view_action.dart
new file mode 100644
index 0000000..3aea6f5
--- /dev/null
+++ b/lib/src/interfaces/view_action.dart
@@ -0,0 +1,4 @@
+abstract class ViewAction {
+  onError({required String message});
+  onSuccess({dynamic data});
+}
diff --git a/lib/src/providers/content.dart b/lib/src/providers/content.dart
deleted file mode 100644
index 00a995c..0000000
--- a/lib/src/providers/content.dart
+++ /dev/null
@@ -1,48 +0,0 @@
-import 'package:flutter/material.dart';
-
-import 'package:tabnews/src/providers/user.dart';
-import 'package:tabnews/src/services/api.dart';
-
-class ContentProvider extends ChangeNotifier {
-  static final ContentProvider _instance = ContentProvider._internal();
-
-  final api = Api();
-
-  factory ContentProvider() {
-    return _instance;
-  }
-
-  ContentProvider._internal() {
-    _isLoading = false;
-    _isCreated = false;
-  }
-
-  late bool _isLoading;
-  bool get isLoading => _isLoading;
-
-  late bool _isCreated;
-  bool get isCreated => _isCreated;
-
-  void _loading(bool value) {
-    _isLoading = value;
-    notifyListeners();
-  }
-
-  void create(String title, String body, String source) async {
-    _loading(true);
-
-    var content = await api.postContent(
-      UserProvider().sessionId,
-      title,
-      body,
-      source,
-    );
-
-    if (content.id!.isNotEmpty) {
-      _isCreated = true;
-    }
-
-    _isLoading = false;
-    notifyListeners();
-  }
-}
diff --git a/lib/src/providers/favorites.dart b/lib/src/providers/favorites.dart
deleted file mode 100644
index 84bb1ef..0000000
--- a/lib/src/providers/favorites.dart
+++ /dev/null
@@ -1,80 +0,0 @@
-import 'dart:convert';
-
-import 'package:flutter/material.dart';
-import 'package:tabnews/src/models/content.dart';
-import 'package:tabnews/src/preferences.dart';
-
-class FavoritesProvider extends ChangeNotifier {
-  static final FavoritesProvider _instance = FavoritesProvider._internal();
-
-  factory FavoritesProvider() {
-    return _instance;
-  }
-
-  FavoritesProvider._internal() {
-    _isLoading = false;
-    _isCreated = false;
-    _favorites = [];
-
-    _getSavedFavorites();
-  }
-
-  late bool _isLoading;
-  bool get isLoading => _isLoading;
-
-  late bool _isCreated;
-  bool get isCreated => _isCreated;
-
-  late List<Content> _favorites;
-  List<Content> get favorites => _favorites;
-
-  void _loading(bool value) {
-    _isLoading = value;
-    notifyListeners();
-  }
-
-  void _getSavedFavorites() async {
-    String savedFavorties = Preferences.getString('favorites') ?? '';
-
-    if (savedFavorties.isNotEmpty) {
-      List contents = jsonDecode(savedFavorties);
-      for (var favorite in contents) {
-        _favorites.add(Content.fromJson(favorite));
-      }
-      notifyListeners();
-    }
-  }
-
-  bool isFavorited(String id) {
-    bool isFavorite =
-        _favorites.where((element) => element.id == id).isNotEmpty;
-
-    if (isFavorite) {
-      return true;
-    }
-
-    return false;
-  }
-
-  void toggle(Content content) async {
-    _loading(true);
-    Content copyContent = content;
-
-    if (_favorites.isNotEmpty) {
-      if (_favorites.where((element) => element.id == content.id).isNotEmpty) {
-        _favorites.removeWhere((element) => element.id == content.id);
-      } else {
-        copyContent.body = null;
-        _favorites.add(copyContent);
-      }
-    } else {
-      copyContent.body = null;
-      _favorites.add(copyContent);
-    }
-
-    Preferences.setString('favorites', jsonEncode(_favorites));
-
-    _isLoading = false;
-    notifyListeners();
-  }
-}
diff --git a/lib/src/providers/user.dart b/lib/src/providers/user.dart
deleted file mode 100644
index f6482e7..0000000
--- a/lib/src/providers/user.dart
+++ /dev/null
@@ -1,149 +0,0 @@
-import 'dart:convert';
-
-import 'package:flutter/material.dart';
-
-import 'package:tabnews/src/constants.dart';
-import 'package:tabnews/src/models/auth.dart';
-import 'package:tabnews/src/models/user.dart';
-import 'package:tabnews/src/preferences.dart';
-import 'package:tabnews/src/services/auth.dart';
-
-class UserProvider extends ChangeNotifier {
-  static final UserProvider _instance = UserProvider._internal();
-
-  final api = ApiAuth();
-  final String _loggedKey = AppConstants.loggedInKey;
-  final String _authKey = AppConstants.authKey;
-  final String _userKey = AppConstants.userKey;
-
-  factory UserProvider() {
-    return _instance;
-  }
-
-  UserProvider._internal() {
-    _isLoading = false;
-    _isRegister = false;
-    _loggedIn = Preferences.getBool(_loggedKey) ?? false;
-
-    if (_loggedIn) {
-      _sessionId = _getSessionId();
-      _user = _getUser();
-    }
-  }
-
-  late bool _loggedIn;
-  bool get loggedIn => _loggedIn;
-
-  late String _sessionId;
-  String get sessionId => _sessionId;
-
-  User? _user;
-  User? get user => _user;
-
-  late bool _isLoading;
-  bool get isLoading => _isLoading;
-
-  late bool _isRegister;
-  bool get isRegister => _isRegister;
-
-  void login(String email, String password) async {
-    _loading(true);
-
-    var auth = await api.postLogin(email, password);
-
-    if (auth.id!.isNotEmpty) {
-      var user = await api.fetchUser(auth.token!);
-
-      Preferences.setString(_authKey, jsonEncode(auth.toJson()));
-      Preferences.setString(_userKey, jsonEncode(user.toJson()));
-      Preferences.setBool(_loggedKey, true);
-      _loggedIn = true;
-      _sessionId = auth.token!;
-      _user = user;
-    }
-
-    _isLoading = false;
-    notifyListeners();
-  }
-
-  void logout() {
-    Preferences.setString(_authKey, '');
-    Preferences.setString(_userKey, '');
-    Preferences.setBool(_loggedKey, false);
-    _loggedIn = false;
-    _sessionId = '';
-    _user = null;
-    _loading(false);
-
-    notifyListeners();
-  }
-
-  void _loading(bool value) {
-    _isLoading = value;
-    notifyListeners();
-  }
-
-  void toggleNotifications(bool? value) {
-    _user?.notifications = value;
-    notifyListeners();
-  }
-
-  void profileUpdate(String email, String username) async {
-    _loading(true);
-
-    var updatedUser = await api.updateUser(
-      token: _sessionId,
-      username: _user?.username,
-      newUsername: _user?.username != username ? username : '',
-      newEmail: _user?.email != email ? email : '',
-      newNotifications: _user?.notifications,
-    );
-
-    if (updatedUser.id != null) {
-      var user = await api.fetchUser(_sessionId);
-
-      Preferences.setString(_userKey, jsonEncode(user.toJson()));
-      _user = user;
-    }
-
-    _isLoading = false;
-    notifyListeners();
-  }
-
-  void register(String username, String email, String password) async {
-    _loading(true);
-
-    var register = await api.postRegister(username, email, password);
-
-    if (register.id!.isNotEmpty) {
-      _isRegister = true;
-    }
-
-    _isLoading = false;
-    notifyListeners();
-  }
-
-  String _getSessionId() {
-    String pref = Preferences.getString(_authKey) ?? '';
-
-    if (pref.isNotEmpty) {
-      Auth auth = Auth.fromJson(jsonDecode(pref));
-
-      return auth.token!;
-    }
-
-    return '';
-  }
-
-  User _getUser() {
-    String pref = Preferences.getString(_userKey) ?? '';
-
-    if (pref.isNotEmpty) {
-      User user = User.fromJson(jsonDecode(pref));
-
-      return user;
-    }
-
-    return User.fromJson({});
-  }
-}
diff --git a/lib/src/services/auth.dart b/lib/src/services/auth.dart
index 5467ae9..52e9307 100644
--- a/lib/src/services/auth.dart
+++ b/lib/src/services/auth.dart
@@ -1,13 +1,12 @@
 import 'dart:convert';
 import 'package:http/http.dart' as http;
 
-import 'package:tabnews/src/models/auth.dart';
-import 'package:tabnews/src/models/user.dart';
+import 'package:tabnews/src/services/http_response.dart';
 
-class ApiAuth {
+class AuthService {
   final apiUrl = 'https://www.tabnews.com.br/api/v1';
 
-  Future<Auth> postLogin(String email, String password) async {
+  Future<HttpResponse> postLogin(String email, String password) async {
     final response = await http.post(
       Uri.parse('$apiUrl/sessions'),
       headers: {
@@ -19,14 +18,10 @@ class ApiAuth {
       }),
     );
 
-    if (response.statusCode == 201) {
-      return Auth.fromJson(jsonDecode(response.body));
-    } else {
-      throw Exception('Failed to login');
-    }
+    return HttpResponse(response.statusCode, response.body);
   }
 
-  Future<User> fetchUser(String token) async {
+  Future<HttpResponse> fetchUser(String token) async {
     final response = await http.get(
       Uri.parse('$apiUrl/user'),
       headers: {
@@ -36,14 +31,10 @@ class ApiAuth {
       },
     );
 
-    if (response.statusCode == 200) {
-      return User.fromJson(jsonDecode(response.body));
-    } else {
-      throw Exception('Failed to get user');
-    }
+    return HttpResponse(response.statusCode, response.body);
   }
 
-  Future<User> updateUser({
+  Future<HttpResponse> updateUser({
     required String token,
     required String? username,
     required String newUsername,
@@ -64,14 +55,10 @@ class ApiAuth {
       }),
     );
 
-    if (response.statusCode == 200) {
-      return User.fromJson(jsonDecode(response.body));
-    } else {
-      throw Exception('Failed to get user');
-    }
+    return HttpResponse(response.statusCode, response.body);
   }
 
-  Future<User> postRegister(
+  Future<HttpResponse> postRegister(
     String username,
     String email,
     String password,
@@ -88,10 +75,6 @@ class ApiAuth {
       }),
     );
 
-    if (response.statusCode == 201) {
-      return User.fromJson(jsonDecode(response.body));
-    } else {
-      throw Exception('Failed to create account');
-    }
+    return HttpResponse(response.statusCode, response.body);
   }
 }
diff --git a/lib/src/services/api.dart b/lib/src/services/content.dart
similarity index 93%
rename from lib/src/services/api.dart
rename to lib/src/services/content.dart
index 30763ed..191805b 100644
--- a/lib/src/services/api.dart
+++ b/lib/src/services/content.dart
@@ -4,8 +4,9 @@ import 'package:http/http.dart' as http;
 import 'package:tabnews/src/models/comment.dart';
 
 import 'package:tabnews/src/models/content.dart';
+import 'package:tabnews/src/services/http_response.dart';
 
-class Api {
+class ContentService {
   final apiUrl = 'https://www.tabnews.com.br/api/v1/contents';
 
   Future<List<Content>> fetchContents({int page = 1}) async {
@@ -93,7 +94,7 @@ class Api {
     }
   }
 
-  Future<Content> postContent(
+  Future<HttpResponse> postContent(
     String token,
     String title,
     String body,
@@ -114,10 +115,6 @@ class Api {
       }),
     );
 
-    if (response.statusCode == 201) {
-      return Content.fromJson(jsonDecode(response.body));
-    } else {
-      throw Exception('Failed to create a new content');
-    }
+    return HttpResponse<Content>(response.statusCode, response.body);
   }
 }
diff --git a/lib/src/services/http_response.dart b/lib/src/services/http_response.dart
new file mode 100644
index 0000000..8ad4c21
--- /dev/null
+++ b/lib/src/services/http_response.dart
@@ -0,0 +1,56 @@
+import 'dart:convert';
+
+class HttpResponse<T> {
+  bool ok = false;
+  String message = "";
+  T? data;
+  final int _statusCode;
+  final String _body;
+
+  HttpResponse(
+    this._statusCode,
+    this._body,
+  ) {
+    _verifyStatus();
+  }
+
+  void _verifyStatus() {
+    switch (_statusCode) {
+      case 200:
+      case 201:
+        ok = true;
+        break;
+      case 204:
+        ok = true;
+        break;
+      case 400:
+        break;
+      case 401:
+        break;
+      case 404:
+        break;
+      case 500:
+        message = "Sem conexão com servidor";
+        break;
+      default:
+        message = "Erro inesperado";
+    }
+
+    _setResponse();
+  }
+
+  void _setResponse() {
+    if (ok) {
+      if (_body.isNotEmpty) {
+        T response = jsonDecode(_body);
+        data = response;
+      }
+    } else {
+      if (message.isEmpty) {
+        dynamic response = jsonDecode(_body);
+
+        message = response['message'];
+      }
+    }
+  }
+}
diff --git a/lib/src/ui/layouts/tab.dart b/lib/src/ui/layouts/tab.dart
index a3573d4..8792017 100644
--- a/lib/src/ui/layouts/tab.dart
+++ b/lib/src/ui/layouts/tab.dart
@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
-import 'package:tabnews/src/providers/user.dart';
 
+import 'package:tabnews/src/controllers/app.dart';
 import 'package:tabnews/src/ui/pages/favorites.dart';
 import 'package:tabnews/src/ui/pages/home.dart';
 import 'package:tabnews/src/ui/pages/login.dart';
@@ -28,9 +27,11 @@ class _TabLayoutState extends State<TabLayout> {
     HomePage(scrollController: pagesScrollController[0]),
     RecentsPage(scrollController: pagesScrollController[1]),
     const FavoritesPage(),
-    Consumer<UserProvider>(
-      builder: (context, provider, _) =>
-          provider.loggedIn ? const ProfilePage() : const LoginPage(),
+    ValueListenableBuilder(
+      valueListenable: AppController.isLoggedIn,
+      builder: (context, isLoggedIn, child) {
+        return isLoggedIn ? const ProfilePage() : const LoginPage();
+      },
     ),
   ];
 
diff --git a/lib/src/ui/pages/content.dart b/lib/src/ui/pages/content.dart
index 96c1ba5..6522850 100644
--- a/lib/src/ui/pages/content.dart
+++ b/lib/src/ui/pages/content.dart
@@ -1,11 +1,11 @@
 import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
-import 'package:tabnews/src/providers/favorites.dart';
 import 'package:timeago/timeago.dart' as timeago;
 
+import 'package:tabnews/src/controllers/favorites.dart';
+import 'package:tabnews/src/utils/open_link.dart';
 import 'package:tabnews/src/extensions/dark_mode.dart';
 import 'package:tabnews/src/models/content.dart';
-import 'package:tabnews/src/services/api.dart';
+import 'package:tabnews/src/services/content.dart';
 import 'package:tabnews/src/ui/widgets/markdown.dart';
 import 'package:tabnews/src/ui/widgets/comments.dart';
 import 'package:tabnews/src/ui/layouts/page.dart';
@@ -26,8 +26,10 @@ class ContentPage extends StatefulWidget {
 }
 
 class _ContentPageState extends State<ContentPage> {
+  final FavoritesController _favoritesController = FavoritesController();
+
   Content content = Content.fromJson({});
-  final api = Api();
+  final _contentService = ContentService();
   final ScrollController _controller = ScrollController();
   bool isLoading = true;
 
@@ -39,7 +41,7 @@ class _ContentPageState extends State<ContentPage> {
   }
 
   Future<void> _getContent() async {
-    var contentResp = await api.fetchContent(
+    var contentResp = await _contentService.fetchContent(
       '${widget.username}/${widget.slug}',
     );
 
@@ -58,16 +60,21 @@ class _ContentPageState extends State<ContentPage> {
       actions: isLoading
           ? null
           : [
-              Consumer<FavoritesProvider>(
-                builder: (context, provider, _) => IconButton(
-                  onPressed: () => provider.toggle(
-                    content,
-                  ),
-                  icon: Icon(
-                    provider.isFavorited(content.id!)
-                        ? Icons.favorite
-                        : Icons.favorite_border,
-                  ),
+              IconButton(
+                onPressed: () => _favoritesController.toggle(
+                  content,
+                ),
+                icon: ValueListenableBuilder(
+                  valueListenable: _favoritesController.favorites,
+                  builder: (context, favorites, child) {
+                    bool isFavorited = favorites
+                        .where((element) => element.id == content.id)
+                        .isNotEmpty;
+
+                    return Icon(
+                      isFavorited ? Icons.favorite : Icons.favorite_border,
+                    );
+                  },
                 ),
               ),
             ],
@@ -104,6 +111,31 @@ class _ContentPageState extends State<ContentPage> {
                           body: '${content.body}',
                           controller: _controller,
                         ),
+                        content.sourceUrl != null
+                            ? Row(
+                                children: [
+                                  Text(
+                                    'Fonte: ',
+                                    style: const TextStyle().copyWith(
+                                      fontWeight: FontWeight.w700,
+                                    ),
+                                  ),
+                                  InkWell(
+                                    onTap: () => OpenLink.open(
+                                      content.sourceUrl,
+                                      context,
+                                    ),
+                                    child: Text(
+                                      '${content.sourceUrl}',
+                                      style: const TextStyle().copyWith(
+                                        color: Colors.blue,
+                                        fontWeight: FontWeight.w700,
+                                      ),
+                                    ),
+                                  ),
+                                ],
+                              )
+                            : const SizedBox(),
                         const SizedBox(height: 30.0),
                         const Divider(),
                         const SizedBox(height: 30.0),
diff --git a/lib/src/ui/pages/favorites.dart b/lib/src/ui/pages/favorites.dart
index 4dd1b40..e02686e 100644
--- a/lib/src/ui/pages/favorites.dart
+++ b/lib/src/ui/pages/favorites.dart
@@ -1,7 +1,6 @@
 import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
-import 'package:tabnews/src/models/content.dart';
-import 'package:tabnews/src/providers/favorites.dart';
+
+import 'package:tabnews/src/controllers/favorites.dart';
 import 'package:tabnews/src/ui/widgets/item_content.dart';
 
 class FavoritesPage extends StatefulWidget {
@@ -12,26 +11,29 @@ class FavoritesPage extends StatefulWidget {
 }
 
 class _FavoritesPageState extends State<FavoritesPage> {
+  final FavoritesController _favoritesController = FavoritesController();
+
   @override
   Widget build(BuildContext context) {
-    return Consumer<FavoritesProvider>(builder: (context, provider, _) {
-      if (provider.favorites.isEmpty) {
-        return const Center(
-          child: Text('Você não possui favoritos!'),
-        );
-      } else {
-        List<Content> favorites = provider.favorites;
-
-        return ListView.builder(
-          padding: const EdgeInsets.all(10.0),
-          itemCount: favorites.length,
-          itemBuilder: (context, index) {
-            return ItemContent(
-              content: favorites[index],
-            );
-          },
-        );
-      }
-    });
+    return ValueListenableBuilder(
+      valueListenable: _favoritesController.favorites,
+      builder: (context, favorites, child) {
+        if (favorites.isEmpty) {
+          return const Center(
+            child: Text('Você não possui favoritos!'),
+          );
+        } else {
+          return ListView.builder(
+            padding: const EdgeInsets.all(10.0),
+            itemCount: favorites.length,
+            itemBuilder: (context, index) {
+              return ItemContent(
+                content: favorites[index],
+              );
+            },
+          );
+        }
+      },
+    );
   }
 }
diff --git a/lib/src/ui/pages/home.dart b/lib/src/ui/pages/home.dart
index 14d108a..09686ba 100644
--- a/lib/src/ui/pages/home.dart
+++ b/lib/src/ui/pages/home.dart
@@ -3,7 +3,7 @@ import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
 
 import 'package:tabnews/src/extensions/dark_mode.dart';
 import 'package:tabnews/src/models/content.dart';
-import 'package:tabnews/src/services/api.dart';
+import 'package:tabnews/src/services/content.dart';
 import 'package:tabnews/src/ui/widgets/item_content.dart';
 import 'package:tabnews/src/ui/widgets/progress_indicator.dart';
 
@@ -18,7 +18,7 @@ class HomePage extends StatefulWidget {
 
 class _HomePageState extends State<HomePage> {
   late List<Content> contents;
-  final api = Api();
+  final _contentService = ContentService();
   bool isLoading = true;
   static const _perPage = 30;
 
@@ -42,7 +42,7 @@ class _HomePageState extends State<HomePage> {
   }
 
   Future<void> _getContents(int page) async {
-    final content = await api.fetchContents(page: page);
+    final content = await _contentService.fetchContents(page: page);
 
     final isLastPage = content.length < _perPage;
 
diff --git a/lib/src/ui/pages/login.dart b/lib/src/ui/pages/login.dart
index 341a79b..901ec58 100644
--- a/lib/src/ui/pages/login.dart
+++ b/lib/src/ui/pages/login.dart
@@ -1,9 +1,9 @@
 import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
 
 import 'package:tabnews/src/constants.dart';
+import 'package:tabnews/src/controllers/auth.dart';
 import 'package:tabnews/src/extensions/dark_mode.dart';
-import 'package:tabnews/src/providers/user.dart';
+import 'package:tabnews/src/interfaces/view_action.dart';
 import 'package:tabnews/src/ui/pages/register.dart';
 import 'package:tabnews/src/utils/navigation.dart';
 
@@ -14,10 +14,31 @@ class LoginPage extends StatefulWidget {
   State<LoginPage> createState() => _LoginPageState();
 }
 
-class _LoginPageState extends State<LoginPage> {
+class _LoginPageState extends State<LoginPage> implements ViewAction {
+  late final AuthController _authController;
+
+  final _formKey = GlobalKey<FormState>();
   TextEditingController emailTextController = TextEditingController();
   TextEditingController passwordTextController = TextEditingController();
-  final _formKey = GlobalKey<FormState>();
+
+  @override
+  void initState() {
+    super.initState();
+
+    _authController = AuthController(this);
+  }
+
+  @override
+  onSuccess({data}) {}
+
+  @override
+  onError({required String message}) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(
+        content: Text(message),
+      ),
+    );
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -81,44 +102,40 @@ class _LoginPageState extends State<LoginPage> {
                 ],
               ),
               const SizedBox(height: 30.0),
-              Consumer<UserProvider>(
-                builder: (context, provider, _) => ElevatedButton(
-                  style: ButtonStyle(
-                    elevation: MaterialStateProperty.all<double>(0.0),
-                    backgroundColor: MaterialStateProperty.all<Color>(
-                      AppColors.primaryColor.withOpacity(
-                        provider.isLoading ? 0.5 : 1.0,
+              ValueListenableBuilder(
+                valueListenable: _authController.isLoading,
+                builder: (context, isLoading, child) {
+                  return ElevatedButton(
+                    style: ButtonStyle(
+                      elevation: MaterialStateProperty.all<double>(0.0),
+                      backgroundColor: MaterialStateProperty.all<Color>(
+                        AppColors.primaryColor.withOpacity(
+                          isLoading ? 0.5 : 1.0,
+                        ),
                       ),
-                    ),
-                    foregroundColor: MaterialStateProperty.all<Color>(
-                      Colors.white,
-                    ),
-                    shape: MaterialStateProperty.all<OutlinedBorder>(
-                      RoundedRectangleBorder(
-                        borderRadius: BorderRadius.circular(4.0),
+                      foregroundColor: MaterialStateProperty.all<Color>(
+                        Colors.white,
+                      ),
+                      shape: MaterialStateProperty.all<OutlinedBorder>(
+                        RoundedRectangleBorder(
+                          borderRadius: BorderRadius.circular(4.0),
+                        ),
                       ),
                     ),
-                  ),
-                  onPressed: provider.isLoading
-                      ? null
-                      : () {
-                          if (emailTextController.text.isEmpty ||
-                              passwordTextController.text.isEmpty) {
-                            return;
-                          }
-
-                          provider.login(
-                            emailTextController.text,
-                            passwordTextController.text,
-                          );
-                        },
-                  child: Text(
-                    provider.isLoading ? 'Aguarde...' : 'Login',
-                    style: const TextStyle().copyWith(
-                      fontSize: 16.0,
+                    onPressed: isLoading
+                        ? null
+                        : () => _authController.login(
+                              emailTextController.text,
+                              passwordTextController.text,
+                            ),
+                    child: Text(
+                      isLoading ? 'Aguarde...' : 'Login',
+                      style: const TextStyle().copyWith(
+                        fontSize: 16.0,
+                      ),
                     ),
-                  ),
-                ),
+                  );
+                },
               ),
               const SizedBox(height: 30.0),
               Row(
@@ -127,8 +144,9 @@ class _LoginPageState extends State<LoginPage> {
                 children: [
                   Text(
                     'Ainda não possui conta?',
-                    style:
-                        const TextStyle().copyWith(color: Colors.grey.shade600),
+                    style: const TextStyle().copyWith(
+                      color: Colors.grey.shade600,
+                    ),
                   ),
                   TextButton(
                     style: const ButtonStyle().copyWith(
@@ -138,7 +156,10 @@ class _LoginPageState extends State<LoginPage> {
                             : AppColors.primaryColor,
                       ),
                     ),
-                    onPressed: () => Navigation.push(context, RegisterPage()),
+                    onPressed: () => Navigation.push(
+                      context,
+                      const RegisterPage(),
+                    ),
                     child: const Text('Criar cadastro'),
                   ),
                 ],
diff --git a/lib/src/ui/pages/my_contents.dart b/lib/src/ui/pages/my_contents.dart
index c9d60b6..5533749 100644
--- a/lib/src/ui/pages/my_contents.dart
+++ b/lib/src/ui/pages/my_contents.dart
@@ -1,9 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
 
+import 'package:tabnews/src/controllers/app.dart';
 import 'package:tabnews/src/models/content.dart';
-import 'package:tabnews/src/providers/user.dart';
-import 'package:tabnews/src/services/api.dart';
+import 'package:tabnews/src/services/content.dart';
 import 'package:tabnews/src/ui/layouts/page.dart';
 import 'package:tabnews/src/ui/widgets/item_content.dart';
 import 'package:tabnews/src/ui/widgets/progress_indicator.dart';
@@ -17,7 +17,7 @@ class MyContentsPage extends StatefulWidget {
 
 class _MyContentsPageState extends State<MyContentsPage> {
   late List<Content> contents;
-  final api = Api();
+  final _contentService = ContentService();
   bool isLoading = true;
   static const _perPage = 30;
 
@@ -41,9 +41,9 @@ class _MyContentsPageState extends State<MyContentsPage> {
   }
 
   Future<void> _getContents(int page) async {
-    final content = await api.fetchMyContents(
+    final content = await _contentService.fetchMyContents(
       page: page,
-      user: '${UserProvider().user?.username}',
+      user: '${AppController.user.value.username}',
     );
 
     final isLastPage = content.length < _perPage;
diff --git a/lib/src/ui/pages/new_content.dart b/lib/src/ui/pages/new_content.dart
index aaaf7b3..bc865ea 100644
--- a/lib/src/ui/pages/new_content.dart
+++ b/lib/src/ui/pages/new_content.dart
@@ -1,11 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:markdown_editable_textinput/format_markdown.dart';
 import 'package:markdown_editable_textinput/markdown_text_input.dart';
-import 'package:provider/provider.dart';
 
 import 'package:tabnews/src/constants.dart';
+import 'package:tabnews/src/controllers/content.dart';
 import 'package:tabnews/src/extensions/dark_mode.dart';
-import 'package:tabnews/src/providers/content.dart';
+import 'package:tabnews/src/interfaces/view_action.dart';
 import 'package:tabnews/src/ui/layouts/page.dart';
 import 'package:tabnews/src/ui/pages/my_contents.dart';
 import 'package:tabnews/src/ui/widgets/markdown.dart';
@@ -18,7 +18,9 @@ class NewContentPage extends StatefulWidget {
   State<NewContentPage> createState() => _NewContentPageState();
 }
 
-class _NewContentPageState extends State<NewContentPage> {
+class _NewContentPageState extends State<NewContentPage> implements ViewAction {
+  late final ContentController _contentController;
+
   TextEditingController titleTextController = TextEditingController();
   TextEditingController bodyTextController = TextEditingController();
   TextEditingController sourceTextController = TextEditingController();
@@ -26,6 +28,36 @@ class _NewContentPageState extends State<NewContentPage> {
 
   bool isViewMarkdown = false;
 
+  @override
+  void initState() {
+    super.initState();
+
+    _contentController = ContentController(this);
+  }
+
+  @override
+  onSuccess({data}) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      const SnackBar(
+        content: Text(
+          'Conteúdo publicado com sucesso!',
+        ),
+      ),
+    );
+
+    Navigation.pop(context);
+    Navigation.push(context, const MyContentsPage());
+  }
+
+  @override
+  onError({required String message}) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(
+        content: Text(message),
+      ),
+    );
+  }
+
   @override
   void dispose() {
     titleTextController.dispose();
@@ -111,56 +143,41 @@ class _NewContentPageState extends State<NewContentPage> {
                   controller: sourceTextController,
                 ),
                 const SizedBox(height: 30.0),
-                Consumer<ContentProvider>(
-                  builder: (context, provider, _) => ElevatedButton(
-                    style: ButtonStyle(
-                      elevation: MaterialStateProperty.all<double>(0.0),
-                      backgroundColor: MaterialStateProperty.all<Color>(
-                        AppColors.primaryColor.withOpacity(
-                          provider.isLoading ? 0.5 : 1.0,
+                ValueListenableBuilder(
+                  valueListenable: _contentController.isLoading,
+                  builder: (context, isLoading, child) {
+                    return ElevatedButton(
+                      style: ButtonStyle(
+                        elevation: MaterialStateProperty.all<double>(0.0),
+                        backgroundColor: MaterialStateProperty.all<Color>(
+                          AppColors.primaryColor.withOpacity(
+                            isLoading ? 0.5 : 1.0,
+                          ),
                         ),
-                      ),
-                      foregroundColor: MaterialStateProperty.all<Color>(
-                        Colors.white,
-                      ),
-                      shape: MaterialStateProperty.all<OutlinedBorder>(
-                        RoundedRectangleBorder(
-                          borderRadius: BorderRadius.circular(4.0),
+                        foregroundColor: MaterialStateProperty.all<Color>(
+                          Colors.white,
+                        ),
+                        shape: MaterialStateProperty.all<OutlinedBorder>(
+                          RoundedRectangleBorder(
+                            borderRadius: BorderRadius.circular(4.0),
+                          ),
                         ),
                       ),
-                    ),
-                    onPressed: provider.isLoading
-                        ? null
-                        : () {
-                            if (titleTextController.text.isEmpty ||
-                                bodyTextController.text.isEmpty) {
-                              return;
-                            }
-
-                            provider.create(
-                              titleTextController.text,
-                              bodyTextController.text,
-                              sourceTextController.text,
-                            );
-
-                            ScaffoldMessenger.of(context).showSnackBar(
-                              const SnackBar(
-                                content: Text(
-                                  'Conteúdo publicado com sucesso!',
-                                ),
+                      onPressed: isLoading
+                          ? null
+                          : () => _contentController.create(
+                                titleTextController.text,
+                                bodyTextController.text,
+                                sourceTextController.text,
                               ),
-                            );
-
-                            Navigation.pop(context);
-                            Navigation.push(context, const MyContentsPage());
-                          },
-                    child: Text(
-                      provider.isLoading ? 'Aguarde...' : 'Publicar',
-                      style: const TextStyle().copyWith(
-                        fontSize: 16.0,
+                      child: Text(
+                        isLoading ? 'Aguarde...' : 'Publicar',
+                        style: const TextStyle().copyWith(
+                          fontSize: 16.0,
+                        ),
                       ),
-                    ),
-                  ),
+                    );
+                  },
                 ),
               ],
             ),
diff --git a/lib/src/ui/pages/profile.dart b/lib/src/ui/pages/profile.dart
index 96a9e4b..d8e2084 100644
--- a/lib/src/ui/pages/profile.dart
+++ b/lib/src/ui/pages/profile.dart
@@ -1,7 +1,8 @@
 import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
 
-import 'package:tabnews/src/providers/user.dart';
+import 'package:tabnews/src/controllers/app.dart';
+import 'package:tabnews/src/controllers/auth.dart';
+import 'package:tabnews/src/interfaces/view_action.dart';
 import 'package:tabnews/src/ui/pages/my_contents.dart';
 import 'package:tabnews/src/ui/pages/new_content.dart';
 import 'package:tabnews/src/ui/pages/profile_edit.dart';
@@ -14,7 +15,28 @@ class ProfilePage extends StatefulWidget {
   State<ProfilePage> createState() => _ProfilePageState();
 }
 
-class _ProfilePageState extends State<ProfilePage> {
+class _ProfilePageState extends State<ProfilePage> implements ViewAction {
+  late final AuthController _authController;
+
+  @override
+  void initState() {
+    super.initState();
+
+    _authController = AuthController(this);
+  }
+
+  @override
+  onSuccess({data}) {}
+
+  @override
+  onError({required String message}) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(
+        content: Text(message),
+      ),
+    );
+  }
+
   @override
   Widget build(BuildContext context) {
     return Container(
@@ -25,12 +47,17 @@ class _ProfilePageState extends State<ProfilePage> {
       child: Column(
         mainAxisAlignment: MainAxisAlignment.center,
         children: [
-          Text(
-            '${UserProvider().user?.username}',
-            style: const TextStyle().copyWith(
-              fontSize: 28.0,
-              fontWeight: FontWeight.w700,
-            ),
+          ValueListenableBuilder(
+            valueListenable: AppController.user,
+            builder: (context, user, child) {
+              return Text(
+                '${user.username}',
+                style: const TextStyle().copyWith(
+                  fontSize: 28.0,
+                  fontWeight: FontWeight.w700,
+                ),
+              );
+            },
           ),
           const SizedBox(height: 80.0),
           ListTile(
@@ -43,13 +70,12 @@ class _ProfilePageState extends State<ProfilePage> {
             title: const Text('Publicar novo conteúdo'),
           ),
           ListTile(
-            onTap: () => Navigation.push(context, ProfileEditPage()),
+            onTap: () => Navigation.push(context, const ProfileEditPage()),
             title: const Text('Editar perfil'),
           ),
           const Divider(color: Colors.grey),
           ListTile(
-            onTap: () =>
-                Provider.of<UserProvider>(context, listen: false).logout(),
+            onTap: () => _authController.logout(),
             title: Text(
               'Deslogar',
               style: const TextStyle().copyWith(
diff --git a/lib/src/ui/pages/profile_edit.dart b/lib/src/ui/pages/profile_edit.dart
index bfab836..b05279f 100644
--- a/lib/src/ui/pages/profile_edit.dart
+++ b/lib/src/ui/pages/profile_edit.dart
@@ -1,20 +1,48 @@
 import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
 
 import 'package:tabnews/src/constants.dart';
-import 'package:tabnews/src/providers/user.dart';
+import 'package:tabnews/src/controllers/app.dart';
+import 'package:tabnews/src/controllers/user.dart';
+import 'package:tabnews/src/interfaces/view_action.dart';
 import 'package:tabnews/src/ui/layouts/page.dart';
 
-class ProfileEditPage extends StatelessWidget {
-  ProfileEditPage({super.key});
+class ProfileEditPage extends StatefulWidget {
+  const ProfileEditPage({super.key});
 
+  @override
+  State<ProfileEditPage> createState() => _ProfileEditPageState();
+}
+
+class _ProfileEditPageState extends State<ProfileEditPage>
+    implements ViewAction {
+  late final UserController _userController;
+
+  final _formKey = GlobalKey<FormState>();
   final TextEditingController usernameTextController = TextEditingController(
-    text: UserProvider().user?.username,
+    text: AppController.user.value.username,
   );
   final TextEditingController emailTextController = TextEditingController(
-    text: UserProvider().user?.email,
+    text: AppController.user.value.email,
   );
-  final _formKey = GlobalKey<FormState>();
+
+  @override
+  void initState() {
+    super.initState();
+
+    _userController = UserController(this);
+  }
+
+  @override
+  onSuccess({data}) {}
+
+  @override
+  onError({required String message}) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(
+        content: Text(message),
+      ),
+    );
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -22,7 +50,7 @@ class ProfileEditPage extends StatelessWidget {
       onRefresh: () async {},
       body: Center(
         child: Padding(
-          padding: const EdgeInsets.all(15.0),
+          padding: const EdgeInsets.all(30.0),
           child: Form(
             key: _formKey,
             child: Column(
@@ -64,64 +92,56 @@ class ProfileEditPage extends StatelessWidget {
                   mainAxisAlignment: MainAxisAlignment.end,
                   crossAxisAlignment: CrossAxisAlignment.center,
                   children: [
-                    Checkbox(
-                      fillColor: MaterialStateProperty.all<Color>(
-                        AppColors.primaryColor,
-                      ),
-                      value: UserProvider().user?.notifications,
-                      onChanged: Provider.of<UserProvider>(context)
-                          .toggleNotifications,
+                    ValueListenableBuilder(
+                      valueListenable: _userController.notification,
+                      builder: (context, notifications, child) {
+                        return Checkbox(
+                          fillColor: MaterialStateProperty.all<Color>(
+                            AppColors.primaryColor,
+                          ),
+                          value: notifications,
+                          onChanged: _userController.setNotifications,
+                        );
+                      },
                     ),
                     const Text('Receber notificações por email'),
                   ],
                 ),
                 const SizedBox(height: 30.0),
-                Consumer<UserProvider>(
-                  builder: (context, provider, _) => ElevatedButton(
-                    style: ButtonStyle(
-                      elevation: MaterialStateProperty.all<double>(0.0),
-                      backgroundColor: MaterialStateProperty.all<Color>(
-                        AppColors.primaryColor.withOpacity(
-                          provider.isLoading ? 0.5 : 1.0,
+                ValueListenableBuilder(
+                  valueListenable: _userController.isLoading,
+                  builder: (context, isLoading, child) {
+                    return ElevatedButton(
+                      style: ButtonStyle(
+                        elevation: MaterialStateProperty.all<double>(0.0),
+                        backgroundColor: MaterialStateProperty.all<Color>(
+                          AppColors.primaryColor.withOpacity(
+                            isLoading ? 0.5 : 1.0,
+                          ),
                         ),
-                      ),
-                      foregroundColor: MaterialStateProperty.all<Color>(
-                        Colors.white,
-                      ),
-                      shape: MaterialStateProperty.all<OutlinedBorder>(
-                        RoundedRectangleBorder(
-                          borderRadius: BorderRadius.circular(4.0),
+                        foregroundColor: MaterialStateProperty.all<Color>(
+                          Colors.white,
+                        ),
+                        shape: MaterialStateProperty.all<OutlinedBorder>(
+                          RoundedRectangleBorder(
+                            borderRadius: BorderRadius.circular(4.0),
+                          ),
                         ),
                       ),
-                    ),
-                    onPressed: provider.isLoading
-                        ? null
-                        : () {
-                            if (emailTextController.text.isEmpty ||
-                                usernameTextController.text.isEmpty) {
-                              return;
-                            }
-
-                            provider.profileUpdate(
-                              emailTextController.text,
-                              usernameTextController.text,
-                            );
-
-                            ScaffoldMessenger.of(context).showSnackBar(
-                              const SnackBar(
-                                content: Text(
-                                  'Perfil atualizado com sucesso!',
-                                ),
+                      onPressed: isLoading
+                          ? null
+                          : () => _userController.update(
+                                usernameTextController.text,
+                                emailTextController.text,
                               ),
-                            );
-                          },
-                    child: Text(
-                      provider.isLoading ? 'Aguarde...' : 'Salvar',
-                      style: const TextStyle().copyWith(
-                        fontSize: 16.0,
+                      child: Text(
+                        isLoading ? 'Aguarde...' : 'Salvar',
+                        style: const TextStyle().copyWith(
+                          fontSize: 16.0,
+                        ),
                       ),
-                    ),
-                  ),
+                    );
+                  },
                 ),
               ],
             ),
diff --git a/lib/src/ui/pages/profile_user.dart b/lib/src/ui/pages/profile_user.dart
index d823d2d..31b5d04 100644
--- a/lib/src/ui/pages/profile_user.dart
+++ b/lib/src/ui/pages/profile_user.dart
@@ -1,8 +1,9 @@
 import 'package:flutter/material.dart';
 import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
+
 import 'package:tabnews/src/models/content.dart';
 import 'package:tabnews/src/models/user.dart';
-import 'package:tabnews/src/services/api.dart';
+import 'package:tabnews/src/services/content.dart';
 import 'package:tabnews/src/services/user.dart';
 import 'package:tabnews/src/ui/layouts/page.dart';
 import 'package:tabnews/src/ui/widgets/item_content.dart';
@@ -19,7 +20,7 @@ class ProfileUserPage extends StatefulWidget {
 
 class _ProfileUserPageState extends State<ProfileUserPage> {
   final userService = UserService();
-  final contentService = Api();
+  final _contentService = ContentService();
   bool _isLoading = true;
   late User _user;
 
@@ -48,7 +49,7 @@ class _ProfileUserPageState extends State<ProfileUserPage> {
   }
 
   Future<void> _getContents(int page) async {
-    final content = await contentService.fetchMyContents(
+    final content = await _contentService.fetchMyContents(
       page: page,
       user: widget.username,
     );
diff --git a/lib/src/ui/pages/recents.dart b/lib/src/ui/pages/recents.dart
index 7eed548..ceab3c2 100644
--- a/lib/src/ui/pages/recents.dart
+++ b/lib/src/ui/pages/recents.dart
@@ -3,7 +3,7 @@ import 'package:infinite_scroll_pagination/infinite_scroll_pagination.dart';
 
 import 'package:tabnews/src/extensions/dark_mode.dart';
 import 'package:tabnews/src/models/content.dart';
-import 'package:tabnews/src/services/api.dart';
+import 'package:tabnews/src/services/content.dart';
 import 'package:tabnews/src/ui/widgets/item_content.dart';
 import 'package:tabnews/src/ui/widgets/progress_indicator.dart';
 
@@ -18,7 +18,7 @@ class RecentsPage extends StatefulWidget {
 
 class _RecentsPageState extends State<RecentsPage> {
   late List<Content> contents;
-  final api = Api();
+  final _contentService = ContentService();
   bool isLoading = true;
   static const _perPage = 30;
 
@@ -42,7 +42,7 @@ class _RecentsPageState extends State<RecentsPage> {
   }
 
   Future<void> _getContents(int page) async {
-    final content = await api.fetchContentsNew(page: page);
+    final content = await _contentService.fetchContentsNew(page: page);
 
     final isLastPage = content.length < _perPage;
 
diff --git a/lib/src/ui/pages/register.dart b/lib/src/ui/pages/register.dart
index 15146dd..b0586c3 100644
--- a/lib/src/ui/pages/register.dart
+++ b/lib/src/ui/pages/register.dart
@@ -1,18 +1,44 @@
 import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
 
 import 'package:tabnews/src/constants.dart';
+import 'package:tabnews/src/controllers/auth.dart';
 import 'package:tabnews/src/extensions/dark_mode.dart';
-import 'package:tabnews/src/providers/user.dart';
+import 'package:tabnews/src/interfaces/view_action.dart';
 import 'package:tabnews/src/ui/widgets/top_bar.dart';
 
-class RegisterPage extends StatelessWidget {
-  RegisterPage({super.key});
+class RegisterPage extends StatefulWidget {
+  const RegisterPage({super.key});
 
+  @override
+  State<RegisterPage> createState() => _RegisterPageState();
+}
+
+class _RegisterPageState extends State<RegisterPage> implements ViewAction {
+  late final AuthController _authController;
+
+  final _formKey = GlobalKey<FormState>();
   final TextEditingController usernameTextController = TextEditingController();
   final TextEditingController emailTextController = TextEditingController();
   final TextEditingController passwordTextController = TextEditingController();
-  final _formKey = GlobalKey<FormState>();
+
+  @override
+  void initState() {
+    super.initState();
+
+    _authController = AuthController(this);
+  }
+
+  @override
+  onSuccess({data}) {}
+
+  @override
+  onError({required String message}) {
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(
+        content: Text(message),
+      ),
+    );
+  }
 
   @override
   Widget build(BuildContext context) {
@@ -23,142 +49,147 @@ class RegisterPage extends StatelessWidget {
           key: _formKey,
           child: Padding(
             padding: const EdgeInsets.all(30.0),
-            child: Consumer<UserProvider>(
-              builder: (context, provider, _) => Column(
+            child: ValueListenableBuilder(
+              valueListenable: _authController.isRegister,
+              builder: (context, isRegister, child) {
+                if (isRegister) {
+                  return Column(
+                    mainAxisAlignment: MainAxisAlignment.center,
+                    crossAxisAlignment: CrossAxisAlignment.stretch,
+                    children: [
+                      Text(
+                        'Confira seu e-mail: ${emailTextController.text}',
+                        style: const TextStyle().copyWith(
+                          fontSize: 20.0,
+                          fontWeight: FontWeight.w700,
+                        ),
+                      ),
+                      const Text(
+                        'Você receberá um link para confirmar seu cadastro e ativar a sua conta.',
+                      ),
+                    ],
+                  );
+                } else {
+                  return child ?? const SizedBox();
+                }
+              },
+              child: Column(
                 mainAxisAlignment: MainAxisAlignment.center,
                 crossAxisAlignment: CrossAxisAlignment.stretch,
-                children: provider.isRegister
-                    ? [
-                        Text(
-                          'Confira seu e-mail: ${emailTextController.text}',
-                          style: const TextStyle().copyWith(
-                            fontSize: 20.0,
-                            fontWeight: FontWeight.w700,
-                          ),
-                        ),
-                        const Text(
-                          'Você receberá um link para confirmar seu cadastro e ativar a sua conta.',
-                        ),
-                      ]
-                    : [
-                        Row(
-                          children: [
-                            Expanded(
-                              child: TextFormField(
-                                enableSuggestions: false,
-                                autocorrect: false,
-                                cursorColor: context.isDarkMode
+                children: [
+                  Row(
+                    children: [
+                      Expanded(
+                        child: TextFormField(
+                          enableSuggestions: false,
+                          autocorrect: false,
+                          cursorColor: context.isDarkMode
+                              ? Colors.white
+                              : AppColors.primaryColor,
+                          decoration: InputDecoration(
+                            focusedBorder: UnderlineInputBorder(
+                              borderSide: BorderSide(
+                                color: context.isDarkMode
                                     ? Colors.white
                                     : AppColors.primaryColor,
-                                decoration: InputDecoration(
-                                  focusedBorder: UnderlineInputBorder(
-                                    borderSide: BorderSide(
-                                      color: context.isDarkMode
-                                          ? Colors.white
-                                          : AppColors.primaryColor,
-                                      width: 2.0,
-                                    ),
-                                  ),
-                                  hintText: 'Nome de usuário',
-                                ),
-                                controller: usernameTextController,
+                                width: 2.0,
                               ),
                             ),
-                          ],
+                            hintText: 'Nome de usuário',
+                          ),
+                          controller: usernameTextController,
                         ),
-                        Row(
-                          children: [
-                            Expanded(
-                              child: TextFormField(
-                                keyboardType: TextInputType.emailAddress,
-                                cursorColor: context.isDarkMode
+                      ),
+                    ],
+                  ),
+                  Row(
+                    children: [
+                      Expanded(
+                        child: TextFormField(
+                          keyboardType: TextInputType.emailAddress,
+                          cursorColor: context.isDarkMode
+                              ? Colors.white
+                              : AppColors.primaryColor,
+                          decoration: InputDecoration(
+                            focusedBorder: UnderlineInputBorder(
+                              borderSide: BorderSide(
+                                color: context.isDarkMode
                                     ? Colors.white
                                     : AppColors.primaryColor,
-                                decoration: InputDecoration(
-                                  focusedBorder: UnderlineInputBorder(
-                                    borderSide: BorderSide(
-                                      color: context.isDarkMode
-                                          ? Colors.white
-                                          : AppColors.primaryColor,
-                                      width: 2.0,
-                                    ),
-                                  ),
-                                  hintText: 'Email',
-                                ),
-                                controller: emailTextController,
+                                width: 2.0,
                               ),
                             ),
-                          ],
+                            hintText: 'Email',
+                          ),
+                          controller: emailTextController,
                         ),
-                        Row(
-                          children: [
-                            Expanded(
-                              child: TextFormField(
-                                enableSuggestions: false,
-                                autocorrect: false,
-                                obscureText: true,
-                                cursorColor: context.isDarkMode
+                      ),
+                    ],
+                  ),
+                  Row(
+                    children: [
+                      Expanded(
+                        child: TextFormField(
+                          enableSuggestions: false,
+                          autocorrect: false,
+                          obscureText: true,
+                          cursorColor: context.isDarkMode
+                              ? Colors.white
+                              : AppColors.primaryColor,
+                          decoration: InputDecoration(
+                            focusedBorder: UnderlineInputBorder(
+                              borderSide: BorderSide(
+                                color: context.isDarkMode
                                     ? Colors.white
                                     : AppColors.primaryColor,
-                                decoration: InputDecoration(
-                                  focusedBorder: UnderlineInputBorder(
-                                    borderSide: BorderSide(
-                                      color: context.isDarkMode
-                                          ? Colors.white
-                                          : AppColors.primaryColor,
-                                      width: 2.0,
-                                    ),
-                                  ),
-                                  hintText: 'Senha',
-                                ),
-                                controller: passwordTextController,
+                                width: 2.0,
                               ),
                             ),
-                          ],
+                            hintText: 'Senha',
+                          ),
+                          controller: passwordTextController,
                         ),
-                        const SizedBox(height: 30.0),
-                        ElevatedButton(
-                          style: ButtonStyle(
-                            elevation: MaterialStateProperty.all<double>(0.0),
-                            backgroundColor: MaterialStateProperty.all<Color>(
-                              AppColors.primaryColor.withOpacity(
-                                provider.isLoading ? 0.5 : 1.0,
-                              ),
-                            ),
-                            foregroundColor: MaterialStateProperty.all<Color>(
-                              Colors.white,
-                            ),
-                            shape: MaterialStateProperty.all<OutlinedBorder>(
-                              RoundedRectangleBorder(
-                                borderRadius: BorderRadius.circular(4.0),
-                              ),
+                      ),
+                    ],
+                  ),
+                  const SizedBox(height: 30.0),
+                  ValueListenableBuilder(
+                    valueListenable: _authController.isLoading,
+                    builder: (context, isLoading, child) {
+                      return ElevatedButton(
+                        style: ButtonStyle(
+                          elevation: MaterialStateProperty.all<double>(0.0),
+                          backgroundColor: MaterialStateProperty.all<Color>(
+                            AppColors.primaryColor.withOpacity(
+                              isLoading ? 0.5 : 1.0,
                             ),
                           ),
-                          onPressed: provider.isLoading
-                              ? null
-                              : () {
-                                  if (usernameTextController.text.isEmpty ||
-                                      emailTextController.text.isEmpty ||
-                                      passwordTextController.text.isEmpty) {
-                                    return;
-                                  }
-
-                                  provider.register(
-                                    usernameTextController.text,
-                                    emailTextController.text,
-                                    passwordTextController.text,
-                                  );
-                                },
-                          child: Text(
-                            provider.isLoading
-                                ? 'Aguarde...'
-                                : 'Criar cadastro',
-                            style: const TextStyle().copyWith(
-                              fontSize: 16.0,
+                          foregroundColor: MaterialStateProperty.all<Color>(
+                            Colors.white,
+                          ),
+                          shape: MaterialStateProperty.all<OutlinedBorder>(
+                            RoundedRectangleBorder(
+                              borderRadius: BorderRadius.circular(4.0),
                             ),
                           ),
                         ),
-                      ],
+                        onPressed: isLoading
+                            ? null
+                            : () => _authController.register(
+                                  usernameTextController.text,
+                                  emailTextController.text,
+                                  passwordTextController.text,
+                                ),
+                        child: Text(
+                          isLoading ? 'Aguarde...' : 'Criar cadastro',
+                          style: const TextStyle().copyWith(
+                            fontSize: 16.0,
+                          ),
+                        ),
+                      );
+                    },
+                  ),
+                ],
               ),
             ),
           ),
diff --git a/lib/src/ui/widgets/comments.dart b/lib/src/ui/widgets/comments.dart
index a3b1de1..49bc315 100644
--- a/lib/src/ui/widgets/comments.dart
+++ b/lib/src/ui/widgets/comments.dart
@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:timeago/timeago.dart' as timeago;
 
 import 'package:tabnews/src/models/comment.dart';
-import 'package:tabnews/src/services/api.dart';
+import 'package:tabnews/src/services/content.dart';
 import 'package:tabnews/src/ui/widgets/item_comment.dart';
 
 class CommentsRootWidget extends StatefulWidget {
@@ -21,7 +21,7 @@ class CommentsRootWidget extends StatefulWidget {
 
 class _CommentsRootWidgetState extends State<CommentsRootWidget> {
   List<Comment> comments = [];
-  final api = Api();
+  final api = ContentService();
 
   @override
   void initState() {
diff --git a/lib/src/ui/widgets/comments_children.dart b/lib/src/ui/widgets/comments_children.dart
index c0282bc..653de3b 100644
--- a/lib/src/ui/widgets/comments_children.dart
+++ b/lib/src/ui/widgets/comments_children.dart
@@ -2,7 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:timeago/timeago.dart' as timeago;
 
 import 'package:tabnews/src/models/comment.dart';
-import 'package:tabnews/src/services/api.dart';
+import 'package:tabnews/src/services/content.dart';
 import 'package:tabnews/src/ui/widgets/item_comment.dart';
 
 class CommentsWidget extends StatefulWidget {
@@ -20,7 +20,7 @@ class CommentsWidget extends StatefulWidget {
 }
 
 class _CommentsWidgetState extends State<CommentsWidget> {
-  final api = Api();
+  final api = ContentService();
 
   @override
   Widget build(BuildContext context) {
diff --git a/pubspec.lock b/pubspec.lock
index 730e789..be929f1 100644
--- a/pubspec.lock
+++ b/pubspec.lock
@@ -198,13 +198,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.0"
-  nested:
-    dependency: transitive
-    description:
-      name: nested
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.0"
   path:
     dependency: transitive
     description:
@@ -275,13 +268,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "4.2.4"
-  provider:
-    dependency: "direct main"
-    description:
-      name: provider
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "6.0.4"
   shared_preferences:
     dependency: "direct main"
     description:
diff --git a/pubspec.yaml b/pubspec.yaml
index 24946cf..0cd36e6 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -40,7 +40,6 @@ dependencies:
   flutter_markdown: ^0.6.13
   http: ^0.13.5
   infinite_scroll_pagination: ^3.2.0
-  provider: ^6.0.4
   shared_preferences: ^2.0.15
   markdown: ^6.0.1
   markdown_editable_textinput: ^2.1.0