I assume the intersection of Mastodon users, Apple users, and serious chess players is very nearly empty, but in case there are some of you out there:
The Marvelous Brass Chessplaying Automaton, my new chess app for Apple platforms, is ready for beta testing. It supports play against the computer and online (Lichess), database features, opening repertoire management with spaced repetition training, local and remote engine analysis, and more.
Want to test? Let me know!