Looks like their website is hosted on a low-powered Android as well… at least it doesn’t load at all here. Edit: now it worked

That said: I tried it before and while it does work it ended up being too limited and annoying. I am planning to try again with a device that has basic PostmarketOS support though. Not enough to be usable as a phone, but as a server it might work if I can get the network over USB work reliably.