Mix oxyclean with washing soda and soak your shirts in it for a few hours before putting them in the washing machine with Gain detergent.

Poweramp. It’s easy to navigate and lets you modify the tags like artist, album, track number, etc.

If you’re on GrapheneOS, you can deny internet access and when your free trial runs out, just clear cache data and you can start your free trial over but that also deletes your playlists (but not the files).

I just bought the full version tho because it’s the best music player ever.