Playbook

Playbook is a Google-developed app that gives you access to tons of articles and videos with information on how to develop and release your Android apps. You can also read about other equally important topics, like how to attract users and, even more importantly, how to expand your user base.

To start, all you have to do is select your main interests. That done, you'll receive a complete list of news articles and videos with information on the topics you've chosen. At the top of the interface, you can get a quick overview of your reading progress.

Playbook is quite an interesting app for Android app developers. Not only does it provide advice about programming, it also gives you access to really interesting information about other equally interesting fields when it comes to releasing a new app.