Developer Tools on Play Store [ https://medium.com/androiddevelopers/developer-tools-on-play-store-85fb710ee33b ]
Supporting your development and testing workflows. Dynamic delivery.
by Ben Weiss
to get previous builds – [https://play.google.com/apps/test/package name/version code]
Extensible mobile app debugger [ https://fbflipper.com/ ]
Flipper is a platform for debugging mobile apps on iOS and Android. Visualize, inspect, and control your apps from a simple desktop interface. Use Flipper as is or extend it using the plugin API.