Quod Libet

Quod Libet is a GTK+-based audio player written in Python, using the Mutagen tagging library.

App ID:

quodlibet

3 of 5 Points, some parts are not phone optimized

Menubar ⇒ File ⇒ Preferences does not fit the screen in portrait and landscape mode. Scale to fit has no impact on this.

sudo apt install quodlibet

# You will need to trust and add flathub to flatpak
https://flathub.org/repo/appstream/io.github.quodlibet.QuodLibet.flatpakref