Notes
We signed this with our Google Developer Key for previous apps we have built. We did not change any of the code and imported our own google-services.json file into the project. All code remains unchanged.
APK works just like the Google Play app.
Credits
Hats off to @cosmostation for having reproducible builds. I did not see this among Keplr or Leap.
https://github.com/cosmostation/cosmostation-android/releases
Contributors
cosmostation