I have many backing/jam tracks and was looking for an app that allowed me to play these through a guitar amp and manually advance to the next track on a playlist or switch quickly between playlists to play a specific track. I spent considerable time in iTunes trying to configure a playlist with silence between the tracks but couldn’t come up with something with which I was satisfied. OneTrack fits my needs perfectly. Within minutes of installing the app I was playing along with my jam tracks and switching between them as I wanted. OneTrack includes a training video and offers a number of features, which I haven’t fully explored yet. For me, OneTrack is a valuable time-saver.