From their apps repo, https://github.com/meienberger/runtipi-appstore/blob/c86641b...: Install the Syncthing app on your Umbrel and pair it with the Syncthing app on your phone or computer for a self hosted peer-to-peer backup solution.

I hope meienberger here hasn't plagiarized source-available project named Umbrel.

The comments in this file seems similar too:

https://github.com/getumbrel/umbrel-apps/blob/eb0f119df8ed89...

https://github.com/meienberger/runtipi-appstore/blob/c86641b...