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 information to create a series of graphs and tables detailing your progress. You can even use it if you're running on a treadmill or using other gym equipment.
Runtastic also includes a social component that enables you to share your best times on Facebook and Twitter in a matter of seconds.
Runtastic is a very useful tool for anyone who is exercising regularly and wants to keep track of their progress. It could also really help anyone who is trying to lose weight.