This looks pretty well maintained.

I’ve got a total hardon for flutter and wish I knew it better. Learning a framework that large would take a while. I might just do it though. A client written in dart/flutter would be absolutely ideal. It compiles to web, android, ios, desktop and has material design stuff. You could trust it when running locally to store your private keys because it can run completely locally.

Most people seem to be sticking to kotlin android and swift for ios though. I guess those are a little easier to develop for or maybe its because people use those for their job.