Signal has reproducible builds for Android: <a href="https:&#x2F;&#x2F;whispersystems.org&#x2F;blog&#x2F;reproducible-android&#x2F;" rel="nofollow">https:&#x2F;&#x2F;whispersystems.org&#x2F;blog&#x2F;reproducible-android&#x2F;</a> ...that just doesn&#x27;t work with F-Droid. And building on their farm means that you have to trust them, and their build farm becomes a prime target if you want to infect lots of apps at once. In the play store, you sign your build, and Android will only let you install builds signed with that same key as updates. By moving the signing to F-Droid, you have to completely trust them.