[jeroenhd]

Apple probably won't allow a full, dynamic Android container on their app store because of restrictions regarding loading code from the internet.

From a technical standpoint, I suppose it's possible, but you'd be stuck with a very barebones Android system without all the system daemons for notifications and such. You'll also need to write some kind of EGL-to-Metal driver to get decent graphical performance out of it.

Seeing how far Anbox and Windows' Android implementation have come, I do wonder if it's possible to take an Android app, stick it into an emulator, and bundle that as an .ipa for use on iOS and macOS. It would certainly make porting easier.