Spend less time waiting for your build to run and more time developing software by enhancing your Gradle build with caching and parallel execution. The fastest part of your build is one you don't even need to run at all. And then run the necessary parts of your build in parallel.

Maestro is a great library for writing high-level UI tests that verify your Android app works from your users' perspective. For a more detailed intro into Maestro, please see my recent Maestro intro post. If you're testing an app that makes REST API calls, you'll need a way to verify those parts of the app work …