Spotify! Although I'm always disappointed by their mobile apps, it's still the easiest and quickest way to create and listen to playlists. Their library is lar

Spotify! Although I'm always disappointed by their mobile apps, it's still the easiest and quickest way to create and listen to playlists. Their library is large enough for me, with only a few (5-6) artists I'm missing. But now that you can add local files, that's not a problem anymore.