insoundious

insoundious is an audio player that stream from YouTube instead of playing local files.

You can stream any audio available (e.g. music) on Youtube. It does not stream video and only fetches audio data, thus eliminating heavy data usage of videos. No audio is stored on your device, they're directly streamed from Google servers, hence saving disk space.

It's fully featured player so you can play, add to queues and support background playback with notification controls. You don't need to keep screen on and enjoy with your listening. And you don't even need Google account to use the app.