The Rhythm Runner app is a supremely clever next-generation app that matches your music to your running pace. By using any smartphone's accelerometer, it can measure your pace and automatically match music to the beats per minute of the music stored on your phone.
For those keen runners out there, you know how annoying it is to have to keep stopping and madly pressing buttons to change a track. The Rhythm Runner app eradicates this problem. Featuring google map intergration, calorie counting, and speed trackers, this genius gadget is a holistic fitness feature.