Displays your location as a British National Grid Reference in the format used on Ordnance Survey Maps.
This application makes use of the built-in Assisted-GPS in the iPhone 3G to deliver an accurate location in less than a minute from a cold start.
Converts the iPhones internal WGS84 Lat/Long coordinates to 8 figure OS grid references when sufficient accuracy is available. Can also display all-numeric 12 digit coordinates.
Unlike some offerings this App carefully filters out less accurate cell tower locations that can be as far as 3 miles away, it only shows positions based on the GPS.
You can also launch Grid Ref during a phone call to tell someone your location, whereas apps that need a data connection like the built in maps wont run.
Should you ever need to call for assistance from a quiet country lane or halfway up a mountain being able to give your location as a Grid Reference will save lot of time.
Note: Best Accuracy obtained on iPhone 3G or iPhone 3GS with a clear view of the sky. Internal GPS needs mobile data signal to initialise but often works out of range of a mobile carrier.