diff --git a/app/schemas/com.example.notimanager.data.source.local.database.NotiManagerDatabase/7.json b/app/schemas/com.example.notimanager.data.source.local.database.NotiManagerDatabase/7.json
index 9c6f87f..bece172 100644
--- a/app/schemas/com.example.notimanager.data.source.local.database.NotiManagerDatabase/7.json
+++ b/app/schemas/com.example.notimanager.data.source.local.database.NotiManagerDatabase/7.json
@@ -2,11 +2,11 @@
   "formatVersion": 1,
   "database": {
     "version": 7,
-    "identityHash": "ddf91ad81bbb46713142177c854d85ad",
+    "identityHash": "0bb8836fe6777d5c9170a6881beae9fe",
     "entities": [
       {
         "tableName": "notification",
-        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `appName` TEXT NOT NULL, `title` TEXT NOT NULL, `content` TEXT NOT NULL, `timestamp` INTEGER NOT NULL)",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `appName` TEXT NOT NULL, `title` TEXT NOT NULL, `content` TEXT NOT NULL, `timestamp` INTEGER NOT NULL, `subText` TEXT NOT NULL)",
         "fields": [
           {
             "fieldPath": "id",
@@ -37,6 +37,12 @@
             "columnName": "timestamp",
             "affinity": "INTEGER",
             "notNull": true
+          },
+          {
+            "fieldPath": "subText",
+            "columnName": "subText",
+            "affinity": "TEXT",
+            "notNull": true
           }
         ],
         "primaryKey": {
@@ -62,7 +68,7 @@
       },
       {
         "tableName": "notification_meta",
-        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`notificationId` INTEGER NOT NULL, `intentActive` INTEGER NOT NULL, `intentArray` BLOB NOT NULL, PRIMARY KEY(`notificationId`), FOREIGN KEY(`notificationId`) REFERENCES `notification`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`notificationId` INTEGER NOT NULL, `intentActive` INTEGER NOT NULL, `intentArray` BLOB NOT NULL, `isRead` INTEGER NOT NULL, PRIMARY KEY(`notificationId`), FOREIGN KEY(`notificationId`) REFERENCES `notification`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
         "fields": [
           {
             "fieldPath": "notificationId",
@@ -81,6 +87,12 @@
             "columnName": "intentArray",
             "affinity": "BLOB",
             "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "isRead",
+            "affinity": "INTEGER",
+            "notNull": true
           }
         ],
         "primaryKey": {
@@ -222,7 +234,7 @@
     "views": [],
     "setupQueries": [
       "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
-      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, 'ddf91ad81bbb46713142177c854d85ad')"
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '0bb8836fe6777d5c9170a6881beae9fe')"
     ]
   }
 }
\ No newline at end of file
diff --git a/app/schemas/com.example.notimanager.data.source.local.database.NotiManagerDatabase/8.json b/app/schemas/com.example.notimanager.data.source.local.database.NotiManagerDatabase/8.json
new file mode 100644
index 0000000..7b13a36
--- /dev/null
+++ b/app/schemas/com.example.notimanager.data.source.local.database.NotiManagerDatabase/8.json
@@ -0,0 +1,240 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 8,
+    "identityHash": "0bb8836fe6777d5c9170a6881beae9fe",
+    "entities": [
+      {
+        "tableName": "notification",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `appName` TEXT NOT NULL, `title` TEXT NOT NULL, `content` TEXT NOT NULL, `timestamp` INTEGER NOT NULL, `subText` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "appName",
+            "columnName": "appName",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "title",
+            "columnName": "title",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "content",
+            "columnName": "content",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "timestamp",
+            "columnName": "timestamp",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "subText",
+            "columnName": "subText",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_notification_appName_title_timestamp",
+            "unique": false,
+            "columnNames": [
+              "appName",
+              "title",
+              "timestamp"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_notification_appName_title_timestamp` ON `${TABLE_NAME}` (`appName`, `title`, `timestamp`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "notification_meta",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`notificationId` INTEGER NOT NULL, `intentActive` INTEGER NOT NULL, `intentArray` BLOB NOT NULL, `isRead` INTEGER NOT NULL, PRIMARY KEY(`notificationId`), FOREIGN KEY(`notificationId`) REFERENCES `notification`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "notificationId",
+            "columnName": "notificationId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "intentActive",
+            "columnName": "intentActive",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "intentArray",
+            "columnName": "intentArray",
+            "affinity": "BLOB",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isRead",
+            "columnName": "isRead",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "notificationId"
+          ]
+        },
+        "indices": [],
+        "foreignKeys": [
+          {
+            "table": "notification",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "notificationId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "notification_icon",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`notificationId` INTEGER NOT NULL, `iconBytes` BLOB NOT NULL, `priorityActive` INTEGER NOT NULL DEFAULT 0, `priority` INTEGER NOT NULL DEFAULT 0, PRIMARY KEY(`notificationId`), FOREIGN KEY(`notificationId`) REFERENCES `notification`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "notificationId",
+            "columnName": "notificationId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "iconBytes",
+            "columnName": "iconBytes",
+            "affinity": "BLOB",
+            "notNull": true
+          },
+          {
+            "fieldPath": "priorityActive",
+            "columnName": "priorityActive",
+            "affinity": "INTEGER",
+            "notNull": true,
+            "defaultValue": "0"
+          },
+          {
+            "fieldPath": "priority",
+            "columnName": "priority",
+            "affinity": "INTEGER",
+            "notNull": true,
+            "defaultValue": "0"
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "notificationId"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_notification_icon_priorityActive_priority",
+            "unique": false,
+            "columnNames": [
+              "priorityActive",
+              "priority"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_notification_icon_priorityActive_priority` ON `${TABLE_NAME}` (`priorityActive`, `priority`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "notification",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "notificationId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "app_icon",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`notiAppName` TEXT NOT NULL, `iconBytes` BLOB NOT NULL, `priorityActive` INTEGER NOT NULL DEFAULT 0, `priority` INTEGER NOT NULL DEFAULT 0, PRIMARY KEY(`notiAppName`))",
+        "fields": [
+          {
+            "fieldPath": "notiAppName",
+            "columnName": "notiAppName",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "iconBytes",
+            "columnName": "iconBytes",
+            "affinity": "BLOB",
+            "notNull": true
+          },
+          {
+            "fieldPath": "priorityActive",
+            "columnName": "priorityActive",
+            "affinity": "INTEGER",
+            "notNull": true,
+            "defaultValue": "0"
+          },
+          {
+            "fieldPath": "priority",
+            "columnName": "priority",
+            "affinity": "INTEGER",
+            "notNull": true,
+            "defaultValue": "0"
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": false,
+          "columnNames": [
+            "notiAppName"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_app_icon_priorityActive_priority",
+            "unique": false,
+            "columnNames": [
+              "priorityActive",
+              "priority"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_app_icon_priorityActive_priority` ON `${TABLE_NAME}` (`priorityActive`, `priority`)"
+          }
+        ],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '0bb8836fe6777d5c9170a6881beae9fe')"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/app/src/androidTest/java/com/example/notimanager/data/service/NotiListenerServiceTest.kt b/app/src/androidTest/java/com/example/notimanager/data/service/NotiListenerServiceTest.kt
index 6c837c9..47a5f5a 100644
--- a/app/src/androidTest/java/com/example/notimanager/data/service/NotiListenerServiceTest.kt
+++ b/app/src/androidTest/java/com/example/notimanager/data/service/NotiListenerServiceTest.kt
@@ -14,8 +14,8 @@ import com.example.notimanager.presentation.ui.activity.MainActivity
 import com.example.notimanager.data.model.NotificationModel
 import com.example.notimanager.data.repository.NotificationRepository
 import com.example.notimanager.domain.service.NotiListenerService
-import com.example.notimanager.data.utils.NameGetter
-import com.example.notimanager.data.utils.IntentHelper
+import com.example.notimanager.domain.utils.NameGetter
+import com.example.notimanager.domain.utils.IntentHelper
 import io.mockk.coEvery
 import io.mockk.coVerify
 import io.mockk.every
diff --git a/app/src/androidTest/java/com/example/notimanager/data/utils/NameGetterTest.kt b/app/src/androidTest/java/com/example/notimanager/data/utils/NameGetterTest.kt
index 01057e7..7cb96e9 100644
--- a/app/src/androidTest/java/com/example/notimanager/data/utils/NameGetterTest.kt
+++ b/app/src/androidTest/java/com/example/notimanager/data/utils/NameGetterTest.kt
@@ -6,6 +6,7 @@ import android.content.pm.PackageManager
 import android.os.UserHandle
 import android.service.notification.StatusBarNotification
 import androidx.test.ext.junit.runners.AndroidJUnit4
+import com.example.notimanager.domain.utils.NameGetter
 import io.mockk.every
 import io.mockk.mockk
 import io.mockk.unmockkAll
diff --git a/app/src/main/java/com/example/notimanager/common/objects/Encoder.kt b/app/src/main/java/com/example/notimanager/common/objects/Encoder.kt
new file mode 100644
index 0000000..bef7951
--- /dev/null
+++ b/app/src/main/java/com/example/notimanager/common/objects/Encoder.kt
@@ -0,0 +1,15 @@
+package com.example.notimanager.common.objects
+
+import java.net.URLDecoder
+import java.net.URLEncoder
+import java.nio.charset.StandardCharsets
+
+object Encoder {
+    fun getEncodedString(target: String): String {
+        return URLEncoder.encode(target, StandardCharsets.UTF_8.toString())
+    }
+
+    fun getDecodeString(target: String): String {
+        return URLDecoder.decode(target, StandardCharsets.UTF_8.toString())
+    }
+}
\ No newline at end of file
diff --git a/app/src/main/java/com/example/notimanager/data/dto/NotificationDto.kt b/app/src/main/java/com/example/notimanager/data/dto/NotificationDto.kt
index e802e84..70dd94c 100644
--- a/app/src/main/java/com/example/notimanager/data/dto/NotificationDto.kt
+++ b/app/src/main/java/com/example/notimanager/data/dto/NotificationDto.kt
@@ -1,7 +1,7 @@
 package com.example.notimanager.data.dto
 
 import android.graphics.BitmapFactory
-import com.example.notimanager.data.utils.IntentHelper.retrieveIntent
+import com.example.notimanager.domain.utils.IntentHelper.retrieveIntent
 import com.example.notimanager.domain.model.Notification
 
 data class NotificationDto(
diff --git a/app/src/main/java/com/example/notimanager/data/model/NotificationMetaModel.kt b/app/src/main/java/com/example/notimanager/data/model/NotificationMetaModel.kt
index b4dd3cb..cd738e5 100644
--- a/app/src/main/java/com/example/notimanager/data/model/NotificationMetaModel.kt
+++ b/app/src/main/java/com/example/notimanager/data/model/NotificationMetaModel.kt
@@ -19,6 +19,7 @@ data class NotificationMetaModel(
     @PrimaryKey
     val notificationId: Long,
     val intentActive: Boolean = true,
-    val intentArray: ByteArray
+    val intentArray: ByteArray,
+    val isRead: Boolean = false,
 )
 
diff --git a/app/src/main/java/com/example/notimanager/data/model/NotificationModel.kt b/app/src/main/java/com/example/notimanager/data/model/NotificationModel.kt
index 514c38a..c7115d2 100644
--- a/app/src/main/java/com/example/notimanager/data/model/NotificationModel.kt
+++ b/app/src/main/java/com/example/notimanager/data/model/NotificationModel.kt
@@ -15,4 +15,5 @@ data class NotificationModel(
     val title: String,
     val content: String,
     val timestamp: Long,
+    val subText: String,
 )
diff --git a/app/src/main/java/com/example/notimanager/data/source/local/database/MigrationObject.kt b/app/src/main/java/com/example/notimanager/data/source/local/database/MigrationObject.kt
index e409fb3..653807b 100644
--- a/app/src/main/java/com/example/notimanager/data/source/local/database/MigrationObject.kt
+++ b/app/src/main/java/com/example/notimanager/data/source/local/database/MigrationObject.kt
@@ -21,4 +21,11 @@ object MigrationObject {
             db.execSQL("CREATE INDEX index_app_icon_priorityActive_priority ON app_icon (priorityActive, priority);")
         }
     }
+
+    val MIGRATION_7_8 = object : Migration(7, 8) {
+        override fun migrate(db: SupportSQLiteDatabase) {
+            db.execSQL("ALTER TABLE notification ADD COLUMN subText TEXT NOT NULL DEFAULT '';")
+            db.execSQL("ALTER TABLE notification_meta ADD COLUMN isRead INTEGER NOT NULL DEFAULT '0';")
+        }
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/example/notimanager/data/source/local/database/NotiManagerDatabase.kt b/app/src/main/java/com/example/notimanager/data/source/local/database/NotiManagerDatabase.kt
index d16c3c3..cc34ac6 100644
--- a/app/src/main/java/com/example/notimanager/data/source/local/database/NotiManagerDatabase.kt
+++ b/app/src/main/java/com/example/notimanager/data/source/local/database/NotiManagerDatabase.kt
@@ -15,9 +15,10 @@ import com.example.notimanager.data.source.local.dao.NotificationIconDao
 import com.example.notimanager.data.source.local.dao.NotificationMetaDao
 import com.example.notimanager.data.source.local.database.MigrationObject.MIGRATION_3_4
 import com.example.notimanager.data.source.local.database.MigrationObject.MIGRATION_6_7
+import com.example.notimanager.data.source.local.database.MigrationObject.MIGRATION_7_8
 
 @Database(
-    version = 7,
+    version = 8,
     entities =
     [
         NotificationModel::class,
@@ -26,7 +27,7 @@ import com.example.notimanager.data.source.local.database.MigrationObject.MIGRAT
         AppIconModel::class
     ],
 //    autoMigrations = [
-//        AutoMigration (from = 6, to = 7)
+//        AutoMigration (from = 7, to = 8)
 //    ]
 )
 abstract class NotiManagerDatabase : RoomDatabase() {
@@ -48,7 +49,8 @@ abstract class NotiManagerDatabase : RoomDatabase() {
                 )
                     .addMigrations(
                         MIGRATION_3_4,
-                        MIGRATION_6_7
+                        MIGRATION_6_7,
+                        MIGRATION_7_8
                         )
                     .fallbackToDestructiveMigration()
                     .build()
diff --git a/app/src/main/java/com/example/notimanager/domain/service/NotiListenerService.kt b/app/src/main/java/com/example/notimanager/domain/service/NotiListenerService.kt
index 76e9653..46e3701 100644
--- a/app/src/main/java/com/example/notimanager/domain/service/NotiListenerService.kt
+++ b/app/src/main/java/com/example/notimanager/domain/service/NotiListenerService.kt
@@ -8,10 +8,11 @@ import com.example.notimanager.data.model.NotificationIconModel
 import com.example.notimanager.data.model.NotificationMetaModel
 import com.example.notimanager.data.model.NotificationModel
 import com.example.notimanager.domain.repository.NotificationRepositoryInterface
-import com.example.notimanager.data.utils.AppIconGetter.convertByteArray
-import com.example.notimanager.data.utils.AppIconGetter.convertByteArrayWithColor
-import com.example.notimanager.data.utils.NameGetter
-import com.example.notimanager.data.utils.IntentHelper
+import com.example.notimanager.domain.utils.AppIconGetter.convertByteArray
+import com.example.notimanager.domain.utils.AppIconGetter.convertByteArrayWithColor
+import com.example.notimanager.domain.utils.AppIconGetter.getAppIcon
+import com.example.notimanager.domain.utils.NameGetter
+import com.example.notimanager.domain.utils.IntentHelper
 import dagger.hilt.android.AndroidEntryPoint
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -34,14 +35,15 @@ class NotiListenerService: NotificationListenerService() {
 
             val title = notification.extras.getString("android.title")
             val content = notification.extras.getString("android.text")
+            val subText = notification.extras.getString("android.subText") ?: ""
 
             if (title != null && content != null){
                 CoroutineScope(Dispatchers.IO).launch {
                     mutex.withLock {
-                        val id = insertNotification(appName, title, content, postTime)
+                        val id = insertNotification(appName, title, content, postTime, subText)
                         insertNotificationMeta(id, it.packageName)
-                        insertNotificationIcon(id, notification.getLargeIcon())
-                        insertAppIcon(appName, notification.smallIcon, notification.color)
+                        insertNotificationIcon(id, notification.getLargeIcon(), notification.smallIcon, notification.color)
+                        insertAppIcon(appName, it.packageName)
                     }
                 }
 
@@ -52,13 +54,15 @@ class NotiListenerService: NotificationListenerService() {
         appName: String,
         title: String,
         content: String,
-        postTime: Long
+        postTime: Long,
+        subText: String
     ): Long{
         val notificationModel = NotificationModel(
             appName = appName,
             title = title,
             content = content,
-            timestamp = postTime
+            timestamp = postTime,
+            subText = subText
         )
         return notificationRepository.insertNotification(notificationModel)
     }
@@ -78,8 +82,18 @@ class NotiListenerService: NotificationListenerService() {
         notificationRepository.insertNotificationMeta(notificationMetaModel)
     }
 
-    private suspend fun insertNotificationIcon(id: Long, icon: Icon?){
-        val byteArray = convertByteArray(this@NotiListenerService, icon)
+    private suspend fun insertNotificationIcon(
+        id: Long,
+        iconLarge: Icon?,
+        iconSmall: Icon?,
+        color: Int
+    ){
+        val byteArray = if (iconLarge != null) {
+            convertByteArray(iconLarge.loadDrawable(this@NotiListenerService))
+        } else {
+            convertByteArrayWithColor(iconSmall?.loadDrawable(this@NotiListenerService), color)
+                ?: ByteArray(0)
+        }
 
         val notificationIconModel = NotificationIconModel(
             notificationId = id,
@@ -90,10 +104,10 @@ class NotiListenerService: NotificationListenerService() {
 
     private suspend fun insertAppIcon(
         appName: String,
-        icon: Icon?,
-        color: Int
+        packageName: String
     ){
-        val byteArray = convertByteArrayWithColor(this@NotiListenerService, icon, color)
+        val byteArray = convertByteArray(getAppIcon(this@NotiListenerService, packageName))
+
         val appIconModel = AppIconModel(
             notiAppName = appName,
             iconBytes = byteArray
diff --git a/app/src/main/java/com/example/notimanager/data/utils/AppIconGetter.kt b/app/src/main/java/com/example/notimanager/domain/utils/AppIconGetter.kt
similarity index 61%
rename from app/src/main/java/com/example/notimanager/data/utils/AppIconGetter.kt
rename to app/src/main/java/com/example/notimanager/domain/utils/AppIconGetter.kt
index 0a1d668..1c1f402 100644
--- a/app/src/main/java/com/example/notimanager/data/utils/AppIconGetter.kt
+++ b/app/src/main/java/com/example/notimanager/domain/utils/AppIconGetter.kt
@@ -1,21 +1,24 @@
-package com.example.notimanager.data.utils
+package com.example.notimanager.domain.utils
 
 import android.content.Context
+import android.content.pm.ApplicationInfo
+import android.content.pm.PackageManager
 import android.graphics.Bitmap
 import android.graphics.Canvas
 import android.graphics.Paint
 import android.graphics.PorterDuff
 import android.graphics.PorterDuffColorFilter
+import android.graphics.drawable.Drawable
 import android.graphics.drawable.Icon
 import com.example.notimanager.common.objects.DateFormatter.toBitmap
 import java.io.ByteArrayOutputStream
 
 object AppIconGetter {
-    fun convertByteArrayWithColor(context: Context, icon: Icon?, color: Int): ByteArray{
-        if (icon == null) return ByteArray(0)
+    fun convertByteArrayWithColor(icon: Drawable?, color: Int): ByteArray?{
+        if (icon == null) return null
 
         // Icon을 Drawable로 변환 후 Bitmap으로 변환
-        val bitmap = icon.loadDrawable(context)?.toBitmap() ?: return ByteArray(0)
+        val bitmap = icon.toBitmap()
         val bitmapConfig = bitmap.config ?: Bitmap.Config.ARGB_8888
 
         // 색상 필터 적용
@@ -37,10 +40,21 @@ object AppIconGetter {
         return stream.toByteArray()
     }
 
-    fun convertByteArray(context: Context, icon: Icon?): ByteArray{
-        val bitmap = icon?.loadDrawable(context)?.toBitmap()
+    fun convertByteArray(icon: Drawable?): ByteArray{
+        val bitmap = icon?.toBitmap()
         val stream = ByteArrayOutputStream()
         bitmap?.compress(Bitmap.CompressFormat.PNG, 100, stream)
         return stream.toByteArray()
     }
+
+    fun getAppIcon(context: Context, packageName: String): Drawable? {
+        return try {
+            val packageManager: PackageManager = context.packageManager
+            val applicationInfo: ApplicationInfo = packageManager.getApplicationInfo(packageName, 0)
+            packageManager.getApplicationIcon(applicationInfo)
+        } catch (e: PackageManager.NameNotFoundException) {
+            e.printStackTrace()
+            null
+        }
+    }
 }
\ No newline at end of file
diff --git a/app/src/main/java/com/example/notimanager/data/utils/IntentHelper.kt b/app/src/main/java/com/example/notimanager/domain/utils/IntentHelper.kt
similarity index 94%
rename from app/src/main/java/com/example/notimanager/data/utils/IntentHelper.kt
rename to app/src/main/java/com/example/notimanager/domain/utils/IntentHelper.kt
index c97c833..4df41ba 100644
--- a/app/src/main/java/com/example/notimanager/data/utils/IntentHelper.kt
+++ b/app/src/main/java/com/example/notimanager/domain/utils/IntentHelper.kt
@@ -1,4 +1,4 @@
-package com.example.notimanager.data.utils
+package com.example.notimanager.domain.utils
 
 import android.content.Intent
 import android.os.Parcel
diff --git a/app/src/main/java/com/example/notimanager/data/utils/NameGetter.kt b/app/src/main/java/com/example/notimanager/domain/utils/NameGetter.kt
similarity index 93%
rename from app/src/main/java/com/example/notimanager/data/utils/NameGetter.kt
rename to app/src/main/java/com/example/notimanager/domain/utils/NameGetter.kt
index 0d8d6da..d4e8ee7 100644
--- a/app/src/main/java/com/example/notimanager/data/utils/NameGetter.kt
+++ b/app/src/main/java/com/example/notimanager/domain/utils/NameGetter.kt
@@ -1,4 +1,4 @@
-package com.example.notimanager.data.utils
+package com.example.notimanager.domain.utils
 
 import android.content.Context
 import android.content.pm.PackageManager
diff --git a/app/src/main/java/com/example/notimanager/presentation/ui/component/NotificationAppListView.kt b/app/src/main/java/com/example/notimanager/presentation/ui/component/NotificationAppListView.kt
index 55813e9..162e116 100644
--- a/app/src/main/java/com/example/notimanager/presentation/ui/component/NotificationAppListView.kt
+++ b/app/src/main/java/com/example/notimanager/presentation/ui/component/NotificationAppListView.kt
@@ -36,6 +36,7 @@ import androidx.compose.ui.unit.dp
 import androidx.hilt.navigation.compose.hiltViewModel
 import androidx.navigation.NavController
 import com.example.notimanager.common.objects.DateFormatter.formatTimestamp
+import com.example.notimanager.common.objects.Encoder.getEncodedString
 import com.example.notimanager.domain.model.NotificationApp
 import com.example.notimanager.presentation.stateholder.state.NotificationAppPriorityState
 import com.example.notimanager.presentation.stateholder.state.NotificationAppState
@@ -74,7 +75,7 @@ fun NotificationAppListView(
                 onClick = {
                     navController
                         .navigate(
-                            "titleScreen/${notification.appName}/${notification.title}"
+                            "titleScreen/${notification.appName}/${getEncodedString(notification.title)}"
                         )
                 },
                 viewModel = viewModel,
@@ -92,7 +93,7 @@ fun NotificationAppListView(
                 onClick = {
                     navController
                         .navigate(
-                            "titleScreen/${notification.appName}/${notification.title}"
+                            "titleScreen/${notification.appName}/${getEncodedString(notification.title)}"
                         )
                 },
                 viewModel = viewModel,
diff --git a/app/src/main/java/com/example/notimanager/presentation/ui/component/NotificationTitleListView.kt b/app/src/main/java/com/example/notimanager/presentation/ui/component/NotificationTitleListView.kt
index 899cd92..de3e7b9 100644
--- a/app/src/main/java/com/example/notimanager/presentation/ui/component/NotificationTitleListView.kt
+++ b/app/src/main/java/com/example/notimanager/presentation/ui/component/NotificationTitleListView.kt
@@ -34,6 +34,7 @@ import androidx.compose.ui.text.style.TextOverflow
 import androidx.compose.ui.unit.dp
 import androidx.navigation.NavController
 import com.example.notimanager.common.objects.DateFormatter.formatTimestamp
+import com.example.notimanager.common.objects.Encoder.getEncodedString
 import com.example.notimanager.domain.model.NotificationTitle
 import com.example.notimanager.presentation.stateholder.state.NotificationTitlePriorityState
 import com.example.notimanager.presentation.stateholder.state.NotificationTitleState
@@ -73,7 +74,7 @@ fun NotificationTitleListView(
         items(currentNotiPriority) { notification ->
             NotificationTitleItemView(notification = notification, onClick = {
                 navController.navigate(
-                    "notificationScreen/${viewModel.getAppName()}/${notification.title}"
+                    "notificationScreen/${viewModel.getAppName()}/${getEncodedString(notification.title)}"
                 )
             }, viewModel = viewModel, priorityViewModel = priorityViewModel)
         }
@@ -85,7 +86,7 @@ fun NotificationTitleListView(
         items(currentNoti) { notification ->
             NotificationTitleItemView(notification = notification, onClick = {
                 navController.navigate(
-                    "notificationScreen/${viewModel.getAppName()}/${notification.title}"
+                    "notificationScreen/${viewModel.getAppName()}/${getEncodedString(notification.title)}"
                 )
             }, viewModel = viewModel, priorityViewModel = priorityViewModel)
         }
diff --git a/app/src/main/java/com/example/notimanager/presentation/ui/navigation/AppNavHost.kt b/app/src/main/java/com/example/notimanager/presentation/ui/navigation/AppNavHost.kt
index 83e56d7..06ee476 100644
--- a/app/src/main/java/com/example/notimanager/presentation/ui/navigation/AppNavHost.kt
+++ b/app/src/main/java/com/example/notimanager/presentation/ui/navigation/AppNavHost.kt
@@ -4,6 +4,7 @@ import androidx.compose.runtime.Composable
 import androidx.navigation.NavHostController
 import androidx.navigation.compose.NavHost
 import androidx.navigation.compose.composable
+import com.example.notimanager.common.objects.Encoder.getDecodeString
 import com.example.notimanager.presentation.ui.screen.MainScreen
 import com.example.notimanager.presentation.ui.screen.NotificationScreen
 import com.example.notimanager.presentation.ui.screen.TitleScreen
@@ -20,12 +21,12 @@ fun AppNavHost(navController: NavHostController) {
         composable("titleScreen/{appName}/{title}") { backStackEntry ->
             val appName = backStackEntry.arguments?.getString("appName")
             val title = backStackEntry.arguments?.getString("title")
-            TitleScreen(navController, appName!!, title!!)
+            TitleScreen(navController, appName!!, getDecodeString(title!!))
         }
         composable("notificationScreen/{appName}/{title}") { backStackEntry ->
             val appName = backStackEntry.arguments?.getString("appName")
             val title = backStackEntry.arguments?.getString("title")
-            NotificationScreen(navController, appName!!, title!!)
+            NotificationScreen(navController, appName!!, getDecodeString(title!!))
         }
     }
 }
\ No newline at end of file
diff --git a/app/src/test/java/com/example/notimanager/data/repository/NotificationRepositoryTest.kt b/app/src/test/java/com/example/notimanager/data/repository/NotificationRepositoryTest.kt
index 9b32c50..5f3a594 100644
--- a/app/src/test/java/com/example/notimanager/data/repository/NotificationRepositoryTest.kt
+++ b/app/src/test/java/com/example/notimanager/data/repository/NotificationRepositoryTest.kt
@@ -16,10 +16,10 @@ import io.mockk.coEvery
 import io.mockk.mockk
 
 class NotificationRepositoryTest: BehaviorSpec({
-    val notificationDao: NotificationDao = mockk()
-    val notificationMetaDao: NotificationMetaDao = mockk()
-    val notificationIconDao: NotificationIconDao = mockk()
-    val appIconDao: AppIconDao = mockk()
+    val notificationDao = mockk<NotificationDao>()
+    val notificationMetaDao = mockk<NotificationMetaDao>()
+    val notificationIconDao = mockk<NotificationIconDao>()
+    val appIconDao = mockk<AppIconDao>()
     val repository = NotificationRepository(
         notificationDao,
         notificationMetaDao,
diff --git a/app/src/test/resources/json/data/model/NotificationModel.json b/app/src/test/resources/json/data/model/NotificationModel.json
index 34d75f1..634015c 100644
--- a/app/src/test/resources/json/data/model/NotificationModel.json
+++ b/app/src/test/resources/json/data/model/NotificationModel.json
@@ -3,5 +3,6 @@
   "appName" : "Weather App",
   "title": "Weather Update",
   "content": "Rain is expected in your area today.",
-  "timestamp": 1672531299000
+  "timestamp": 1672531299000,
+  "subText": "test"
 }
\ No newline at end of file