I wonder if one could build this in HTML, so there is no need to install anything.
On both iOS and Android, HTML can play videos and mp3s while the screen is turned off. So maybe it is possible?
replies(4):
https://stackoverflow.com/questions/64283711
It works nicely in Chrome on the desktop and on Android. Not sure how the situation is on iOS.
Edit: https://caniuse.com/native-filesystem-api
Edit2: Just a few posts down: https://webamp.org/