iLift - Slow down music, change the key, and loop (iOS) app for $4.99
iLift for iPhone is the easiest way to learn music from recordings. It allows you to slow down music, change the key, and loop. Whether you're learning a fiddle tune, lifting changes for a gig, or playing along with classical recordings, this app will help you develop your listening ability. iLift has a simple interface with no instructions so that you can spend your time learning music instead!