NavigX for iPhone, the world's first Ordnance Survey grid reference (OS Grid) converter for the iPhone and iPod Touch, is available for download in the App Store. Whether you need basic conversion between Latitude and Longitude into OS Grid format, you want your current position displayed in a format usable in Ordnance Survey mapping or you want the features of a full-blown GPS without the bulk of a separate unit, NavigX for iPhone is the app for you.
Ported from the Mac version, NavigX for OS X, to the iPhone user feedback shapes the development of future upgrades. As location services are available on all versions of the iPhone, NavigX for iPhone will give you precise conversion, location and navigation. iPod Touch users can take advantage of the conversion features only.