A utility library for Android to run jobs delayed in the background. Depending on the Android version either the JobScheduler, GcmNetworkManager or AlarmManager is getting used. You can find out in this blog post or in these slides why you should prefer this library than each separate API. All features from Android Oreo are backward compatible back to Ice Cream Sandwich. Starting with version 1.3.0 the library will use the WorkManager internally, please read the documentation and opt-in.