FitKit (‿)

Flutter plugin for reading health and fitness data. Wraps HealthKit on iOS and GoogleFit on Android.

Usage

To use this plugin, add fit_kit as a dependency in your pubspec.yaml file.

Getting Started

Android

Enable Fitness API and obtain an OAuth 2.0 client ID.

iOS

Enable HealthKit and add NSHealthShareUsageDescription key to the Info.plist file.

Sample Usage

If you're using more than one DataType it's advised to call requestPermissions with all the data types once, otherwise iOS HealthKit will ask to approve every permission one by one in separate screens.

import 'package:fit_kit/fit_kit.dart';

void read() async {
  try {
    final results = await FitKit.read(
      DataType.HEART_RATE,
      dateFrom: DateTime.now().subtract(Duration(days: 5)),
      dateTo: DateTime.now(),
    );
  } on UnsupportedException catch (e) {
    // thrown in case e.dataType is unsupported
  }
}

void readLast() async {
  final result = await FitKit.readLast(DataType.HEIGHT);
}

void readAll() async {
  if (await FitKit.requestPermissions(DataType.values)) {
    for (DataType type in DataType.values) {
      final results = await FitKit.read(
        type,
        dateFrom: DateTime.now().subtract(Duration(days: 5)),
        dateTo: DateTime.now(),
      );
    }
  }
}

Supported data types

These are currently available data types and their corresponding GoogleFit/HealthKit types.

Data Type	Android (GoogleFit)	iOS (HealthKit)	Unit
HEART_RATE	TYPE_HEART_RATE_BPM	heartRate	count/min
STEP_COUNT	TYPE_STEP_COUNT_DELTA	stepCount	count
HEIGHT	TYPE_HEIGHT	height	meter
WEIGHT	TYPE_WEIGHT	bodyMass	kilogram
DISTANCE	TYPE_DISTANCE_DELTA	distanceWalkingRunning	meter
ENERGY	TYPE_CALORIES_EXPENDED	activeEnergyBurned	kilocalorie
WATER	TYPE_HYDRATION	dietaryWater >= iOS 9	liter
STAND_TIME	Not supported	appleStandTime >= iOS 13	minute
EXERCISE_TIME	Not supported	appleExerciseTime >= iOS 9.3	minute
SLEEP	FitnessActivities.SLEEP	sleepAnalysis	iOS: 0 - inBed 1 - asleep 2 - awake Android: 72 - SLEEP 109 - SLEEP_LIGHT 110 - SLEEP_DEEP 111 - SLEEP_REM 112 - SLEEP_AWAKE

BE AWARE

• Calling await FitKit.read(dataType) without any extra parameters can lead to FAILED BINDER TRANSACTION on Android devices because of the data batch size being too large.

There's some differences on iOS for these methods:

• FitKit.hasPermissions - false means no, true means user has approved or declined permissions.

  To help prevent possible leaks of sensitive health information, your app cannot determine whether or not a user has granted permission to read data. If you are not given permission, it simply appears as if there is no data of the requested type in the HealthKit store. https://developer.apple.com/documentation/healthkit/hkhealthstore/1614154-authorizationstatus

• FitKit.revokePermissions - isn't supported by HealthKit, method does nothing.