It’s been a weird situation.

• Discontinuing syncthing-android - 2024

• But then they list Syncthing-Fork in the docs, seemingly giving the fork their blessing

• https://github.com/catfriend1/syncthing-android <-- the fork repo

  • doesn’t publish to Google Play
  • some other person named nel0x publishes the Google Play releases
  • Catfriend1 only publishes on F-Droid and GitHub

So I guess your main options are:

• F-Droid
• Google Play