What are /r/galaxyj3's favorite Products & Services?

From 3.5 billion Reddit comments

You can download a music player app which automatically finds music on your phone and let's you listen (with the screen off).

There's quite a few on the Play Store but I like something minimal like Black player - https://play.google.com/store/apps/details?id=com.kodarkooperativet.blackplayerfree