Accelerun is a music player that helps you keep in rhythm while exercising by changing the speed of your music to sync up with your steps.

Music can make running easier. However, at the wrong tempo, it can have the opposite effect. With Accelerun, you can simply set a tempo and run. Step with the beat, and the music will push you. Most tracks with a constant tempo and a strong beat should work well. Accelerun uses a high-quality time-stretching algorithm with minimal distortion.

You can also create running playlists ahead of time in Accelerun, helping reduce the mid-run interruption of changing music. Music can be selected from your device's Music Library, and now YouTube videos can be added to your list! (Note: YouTube requires an active data connection during the run.)