Musicon Lite (simply.made.MusiconFree) on Google Play
Musicon is the first music player of it's kind. Musicon intelligently creates playlists based on the songs you like and re-adjusts the playlist after each like or dislike for a personalized experience. It uses your music library allowing for unlimited skips and prevents the need of an expensive data plan*. The AudioPlayer also is simple to use. The buttons are clearly laid out and allow for upvoting or downvoting the playing song. Skipping through the playlist is incredibly simple supporting even swipes to switch between songsTo remove the playlist size limit, and add the ability to save playlists, please upgrade to the full version.*(There are web requests but they're small and none of the music is streaming)