By Abbe Wright
The App: Cruise Control: Run
Meet Your New Playlist
No more off-tempo beats or slow-song lulls: The app analyzes your iTunes library and extracts only high-energy tracks with ideal tempos for your stride, then can speed them up or slow them down to match your footfalls.
Personalize Your Stride
Aiming to conquer a seven-minute mile? The pace feature matches songs to your target speed and automatically changes the BPM to get you there -- all you have to do is run to the rhythm. If heart rate is more of a concern, the music can also push you to reach that goal.
Track Your Progress
The app logs your time, speed, distance, even calories burned, and provides stats (complete with a map of your route) so you can monitor your improvement. Share your mileage -- and the songs that spurred your latest runner's high -- on Facebook.