This app was removed from the App Store.
Mac OS Music
Heartbeat is a simple menu bar app that let's you and your friends listen to the same Spotify music in real time!
Whenever you or one of your friends plays a new song it will automatically play for everyone listening.
Pro-tip: perfect for long distance relationships :)
+ Improved synchronization
+ Shared control over music
+ Like feature
+ Simpler pairing
+ UI/UX refinement
+ Faster synchronization
+ Support for light status bar (I can't believe I forgot about it)