On TUAW we've looked at many apps which let you slow down the tempo or change the pitch of a song to help you practice music more effectively. And that's exactly what Anytune does, but with a great degree of detail and some extra features to help even further.
Anytune is a free, universal app, but with In App Purchases (IAPs) to add extra features and functionality, turning Anytune into Anytune Pro+. The free version of Anytune lets you import music from your iOS library, adjust the pitch and tempo with great detail -- without affecting sound quality -- and select and m