Are you a Principle user? Download the prototype here to play around (the iOS app is free!): Download ListenIn.prd (6.7mb)

Each song has a set of actions that can be swiped through: Follow artist on Spotify, show song lyrics, save song to library, and (out of sight because it was too silly to make the cut) annoy your friends with an airhorn.

Swiping up from the bottom of the screen reveals the set's previous songs.