The popular fitness app, RunKeeper, for iPhone is now available for Android. It’s free and all you have to do is search for RunKeeper in the Android marketplace. RunKeeper uses the phones GPS to track your exercise. You get your route laid out on a map and can share data online. There are devices specifically designed for this like the Garmin forerunner but just an app on a phone you already own is great. Plus from the devices I have used the RunKeeper website is better.