To say Groove makes great playlists is an understatement. In essence, the app serves as a controller for the stock iPod or Music apps with an enhanced smart playlist generator and the power of Last.fm. Groove 2 is a most welcome improvement of Groove 1 (a freemium iPhone app). If streaming radio isn’t your thing, then you will be very satisfied by the Groove 2 experience. This universal app brings both a gorgeous visual design and an impressive set of features for listening to synced music on your device. The developers describe it as “a music player that studies your listening habits and creates a wide variety of instant mixes like your own personal DJ.” I have found this claim to be highly accurate and I haven’t had to manually create an iTunes playlist since. Groove 2 by Zikera is a perfect blend of beautiful design and enhanced music playback functionality.