That’s what I got confused. Thanks for clearing thing up.

Syncthing is pretty unmaintained now, community worries about it get abandoned multiple times. Stick around and introduce your app to those future post and your app will shine. If you are into serious backup, i would look at bareos,but it is way overkill for most ppl and old too, but very good backup pro sumer lvl open source solution. I once tried hard to shop around

Speed conpared to rsync? Hash speed and cpu load compared? Need shell access for ssh? What about two devices across firewalls and internet which you can’t control? I think one of the usecase is only sync when you have WiFi. Still want android apk for my lazy ass. Good project