Nike+ is an interactive program to help you train and track your running progress. Beyond recording your run history and stats, Nike+ motivates you to train via the social sphere, too. Challenge your friends to compete with you, win virtual trophies, and compare your speed and mileage with your friends. If competing isn't your thing, Nike+ and Facebook have paired up, creating an easy way for your friends to post encouraging messages to you while you run. Nike+ can be used on a variety of products including the iPod nano, Nike+ SportBand, and Nike+ SportWatch GPS. However, if you have an iPhone, you can also download the Nike+ GPS App.