Runtastic

Runtastic is a tool that you can use to keep track of your workouts, whether it's going out for a jog, a walk, or even a bike ride. The program uses GPS to keep track of how far you go, how long it takes you, how fast you're moving, a previous time that you should try to beat, and even the approximate number of calories that you're burning along the way. The application then uses this informat...