1. Get started with publishing. http://developer.android.com/distribute/googleplay/start.html. Get started with publishing. http://developer.android.com/distribute/googleplay/start.html.
2. Statista. http://www.statista.com/statistics/266210/number-of-available-applications-in-the-google-play-store. Statista. http://www.statista.com/statistics/266210/number-of-available-applications-in-the-google-play-store.
3. Monkeyrunner tool. http://developer.android.com/tools/help/MonkeyRunner.html. Monkeyrunner tool. http://developer.android.com/tools/help/MonkeyRunner.html.
4. Where is the energy spent inside my app?
5. Detecting energy bugs and hotspots in mobile apps