Does your fitness routine include jogging? How about walking or bicycling?
If you do any of these activities, a free mobile app called Runkeeper will give you up-to-the-second, real-time info about how far you have gone so far, and how fast.
Runkeeper works with your phone’s GPS radio to establish your current location, the distance you have traveled, your speed, and even your current elevation!
You can download Runkeeper for free for both the iPhone and Android devices. There is a paid pro version as well (but only for the iPhone) that offers a few extra features, but most people will find that the free version is all they really need.