Why did you restrict it by country? I’m in the EU and can’t install it.

You are most likely in France: your government does not allow publishing an app containing cryptography (in this case, Golang's crypto implementations and a package used by Syncthing - only using iOS libs should be fine) without authorization (which can only be obtained through French forms, at which point I'd want a French lawyer to be involved, so no).

You could of course build the app yourself from source.

Unfortunately not available in my country (Malaysia)

Android unfortunately.

Cool app though!