Cadence lets you set the tempo of your iPhone's tunes

Cadence is an iPhone app that creates custom playlists from your iTunes library, each set to a different tempo. If you're a runner, a DJ, or just someone who likes to keep everything going to the beat, it's worth a look. To use Cadence, you'll have to download a small Mac desktop app that automatically finds the tempos of the songs in your library. Scanning takes time, but you only have to do it once.

When the scan is through, one click will automatically create playlists (20 songs each, when I tried it) at various tempos. Sync them to your iPhone and you're ready to go. Opening the Cadence iPhone app lets you slide a metronome until you find the beat that matches, then let go and start moving to hear music that matches your rhythm. Download it on the iTunes App Store here.

Tags: bpm, cadence, iphone, music, running, tempo