Back|Track 2.0 for iPhone and iPad improves control over the songs in your media library. Back|Track was designed for musicians who need fast and simple controls to help them learn and practice songs. Quickly and efficiently back up a song by a customizable duration by simply tapping the large album art touch target. Add an optional 4-beat count-in to prepare your instrument before the song begins. Loop a specific region to improve on those difficult phrases. Change the playback speed to build accuracy. Back|Track works with the songs purchased and downloaded to your media library or songs streamed with an active subscription to Apple Music.