I find this interesting, there was a briar app that was spoken about a few months ago that was only for android citing that iOS had issues [0] with apps running in background, wonder if/how this was solved here.
Also, I have not seen unlicense before -- guess I'm one of todays lucky 10,000
As long as it's Swift, I guess. The Protocols files seem "agnostic." I think the lower-level hardware files might need to be rewritten, though, so he's saying that an Android developer could write an app that incorporates the protocol.
If I were an Android developer, though, I'd just use the Swift files as a requirements spec, and write it native.
From what I can see, it's a native IOS/MacOS app (SwiftUI). I don't see an Android version.
Also seems pretty spartan, but it looks like it could be embedded in "friendlier" apps.