I’ve just been using the audio player on ES File Explorer. It tends to forget all its state and has various other UI problems.

I’m interested in an audio player that will keep playlists for me, and remembers its state so I can resume playback. My main use case is to cue up podcasts for driving, so I want it to save my place when I don’t finish listening to a whole episode during my drive. Saving my place in multiple playlists would be great too, like an audiobook and a series of podcast episodes would both have saved state so I could switch between them.

Ideally it would also activate playback whenever the phone connects to a particular bluetooth device - my car audio. The use case is I hop in the car, turn on my bluetooth receiver, and audio resumes without me needing to take the phone out of my pocket. Turn off bluetooth, playback stops.