Recently we got to try two unofficial Bitrise clients and we think you should know about them too. 😉
With these apps, you log in to your Bitrise account, list your projects, see the builds and download artifacts, for example, the APKs from Bitrise straight onto your phone to install them.
These couldn't have been made without our new API, which is still in progress, but anyhow, feel free to use it. Read the details and check our present endpoints on Devcenter. Should you need any other endpoint, let us know here.
Unofficial Bitrise Client for Android by Jocelyn David

This app is already available in Google Play Store. With this app you can list your projects and download the artifacts.
Unofficial Bitrise Android client by Hannes Kleist (milosz)

This one is available from a public install page only (yet). You can download v0.9 (prerelease) and check it out.
Update: the app has been released and is available in Google Play Store.