react-native-background-job

Schedule background jobs that run your JavaScript when your app is in the background or if you feel brave even in foreground.

The jobs will run even if the app has been closed and, by default, also persists over restarts.

This library relies on React Native’s HeadlessJS which is currently only supported on Android.

On the native side it uses either Firebase JobDispatcher or a AlarmManager.

Firebase JobDispatcher (default): The jobs can’t be scheduled exactly and depending on the Android API version different period time is allowed. FirebaseJobDispatcher is the most battery efficient backward compatible way of scheduling background tasks.
AlarmManager by setting exact to true: Simple propriatery implementation that is only ment to be used while testing. It only cares about executing on time, all other parameters are ignored - job is not persisted on reboot.