Stable and beta versions built by the developers
To add it to your F-Droid client, use this URL:
https://app.simplex.chat/fdroid/repo
Signing key fingerprint (SHA-256):
9F 35 8F F2 84 D1 F7 16 56 A2 BF AF 0E 00 5D EA E6 AA 14 14 37 20 E0 89 F1 1F F2 DD CF EB 01 BA
Stable versions built by F-Droid.org
The releases to this repo are done several days later.
SimpleX Chat and F-Droid.org repositories sign builds with the different keys. To switch, please export the chat database and re-install the app.