Before fastlane became part of Twitter, fastlane was only available for iOS applications. This year, at Twitter Flight, we announced Android support for fastlane. We started by helping you ship your app to Google Play using supply. Of course, we also integrated with the tools you already love, like Gradle.
Check out the Fabric Blog Post for more information.
Unless otherwise mentioned in the post, those projects are side projects which I work on on weekends and evenings, and are not affiliated with my work or employer.