There’s some nostr experiments to embed a relay in to the mobile app right? And I think amethyst has done something making the mobile app a nip-46 remote signer. nostr:note1s2h2k9f7eut0cvg6dr5yl3njc6ns2yg9c5k9lm5gg04h86nn5u4qypkrv6
https://github.com/greenart7c3/Citrine Citrine is the relay. There's a lot of work to do on configuration and the ui but already works as a local relay. And amber is the signer. https://github.com/greenart7c3/Amber