Superstar
Runners now have an iPhone app to call their own, thanks to the Nike+ GPS app. This app tracks your mileage via Google Maps and offers helpful encouragements from celebrities and trainers.

The Nike+ GPS app is truly amazing, providing you with feedback during your run as well as giving you access to NikePlus.com -- a website for runners using the app. If you're looking to get back in shape but can't do it alone, then this is the app for you. Stay running, my friends.