GridPoint GB gives your current Ordnance Survey (OS) National Grid reference, and illustrates how to use this to locate yourself on an OS map. Imagine: - You're out and about - You have a paper OS map of the area - You don't have mobile phone reception GridPoint GB is useful when all three of these things are true. It makes it easy to locate yourself without a mobile signal (when Google Maps shows your position relative only to a featureless grey-and-white checkerboard). GridPoint GB works only in Great Britain. Since it relies on GPS, it is only really useful on the iPhone 3G. For details and instructions, please see http://mackerron.com/gridpointgb/
||Compatible with iPhone. iTunes account required.