Nike has released an update to its Nike+ GPS app for the iPhone and iPod touch adding a new competitive game mode. Dubbed Nike+ Tag, the game allows users to challenge their friends to a virtual game of tag where players must avoid being “it” by running a greater distance, longer amount of time or earlier in the day than their friends. Players create a tag challenge and specify the rules based on distance, time running or time of day and then invite their friends to participate. A game of Nike+ Tag lasts three days or until all of the friends have taken part, and the runner with the lowest score becomes designated as “it” at which point the other players can post comments to their Nike+ home screen. The player designated as “it” continues to hold their designation until the next game of Nike+ Tag. Nike+ GPS is compatible with the iPhone 3GS, iPhone 4 and iPod touch running iOS 4.0 or later and is available from the App Store for $2.