djSport is an audio app that adjusts, in real time, the playback rate, or tempo, of virtually any audio file in your iPhone music library - without a corresponding change in pitch.
The native beat of a favorite song is often too slow for jogging, running on a treadmill, etc. With djSport, you simply increase the tempo of your song. The custom tempo for each song can be saved with a press of a button. What's more, you can then create custom playlists of songs, each with its own custom tempo.
The real time tempo adjustment in djSport is also useful for activities that involve "warm up" and "cool down," e.g. aerobics or spinning class. During warm up, the tempo can be gradually increased in real time with disturbing the integrity of the music. During cool down, the tempo can be gradually decreased.
djSport can be used as an audio tool for those of you learning a new song. The tempo can be slowed initially for better music identification and practice.