GridPoint GB vs GB Grid Ref Compass

If you have a paper Ordnance Survey (OS) map, GridPoint GB makes it easy to locate yourself — even when you've got no mobile reception. The app uses your iPhone's GPS and compass to provide your current grid reference and heading, and illustrates how to use this to locate yourself on the map. Coordinate conversions are implemented via OS's OSTN02, accurate to within 1m. The app also: * Includes an Apple Watch app and associated complication * Reports full numerical easting and northing, tetrad, raw latitude/longitude, a nearby postcode, and various heading parameters * Has a sharing facility so you can share, copy or store your location * Calculates next sunset and sunrise times * Can emit a distress signal, just in case All features are free to use — the in-app purchase is simply a tip you can give the developer to show appreciation. For details and instructions, please see http://mackerron.com/gridpointgb/ Please note: this app works ONLY in Britain (i.e. England, Scotland or Wales). It does not operate in other parts of the UK or British Isles and cannot provide coordinates in Northern Ireland or the Republic of Ireland, since a different coordinate system is used.

Find out your current location on a GB Map, whilst in Great Britain. This app will give you your GB Grid Ref (Ordnance Survey / OS Grid Reference), along with a Compass Bearing and Latitude and Longitude values in both OSGB36 and WGS84 formats. The accuracy of the Device GPS signal will also be shown. Includes a handy graphical guide to the "National Grid" system. Whilst the app will work worldwide, the values given will only be of use within the United Kingdom. Ideal for use on walks. Always carry a map and physical compass in addition to your iPhone. For the best accuracy, use in an open space, away from trees or hill edges. Like a traditional compass, use with the phone in a flat position, not upright. When continued usage is required, you can set the iPhone Screen to stay on indefinitely, from the Settings tab. Send or Share your location information in a Text Message (or iMessage), Email or Tweet* This app requires Location Services to be enabled in your iPhone, and you must grant permission to the app to use these. Compatible with iPhone. Not compatible with iPod Touch, or (non-cellular) iPads, due to the lack of GPS and Compass hardware. * - Internet Connection, and correctly configured Text Message (or iMessage), Email and / or Twitter settings, required to fulfil. -- A sister app is now available for use in Ireland. Please search for Irish Grid Ref Compass.