Have you ever gone out and then a few hours later discovered that a friend of yours was nearby but you had no idea? Wouldn't it have been cool to have hung out? They've already got an iOS device, right? Of course they have. Then maybe you both need find-U the latest social networking app from ReadMe.
It enables you to locate your friends in near real time within a few meters. You can map them too and see where they're wandering off to. You can also divide people into groups, so you can quickly glance to see where everyone is at the moment.
Initially you might feel a little concerned about safety issues. Fortunately there's some great looking safety features that keep everything safe such as passwording for groups as well as parental controls.
It's all pretty detailed, keeping track of everything from the speed your friend is travelling at as well as how long they've been there and where they were previously.
How useful it is will depend on your social life, but I can certainly see this being exceptionally handy on a night out when you're trying to track down friends.
find-U is available on the App Store for $2.99 at the moment.