Was should sync and make it happen https://github.com/KoalaSat/samiz
my weekend project to learn more about bluetooth mesh networks, relays, store and forward models, encryption models, and a few other things: https://github.com/jackjackbits/bitchat
nostr-only TestFlight if you want to play with it: https://testflight.apple.com/join/QwkyFq6z
Discussion
How compatible?!?!
Yes, but as I see this works as an isolated client.
Not impossible, but the idea of nostr:npub1yjxerh4msvgqf230ej3648a28xhvxjstqr2rhpjt2eelf538e70scnl9d0 is to take care only of the data transmission layer and let the uset to use its own nostr client/relay.