GridPoint GB vs MX Map Mobile

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.

The MX Map Mobile system is designed to be used with Mapyx Quo and MX Map GIS software packages. Maps can be acquired through in-app purchase. This combined solution of Mapyx Quo and MX Map Mobile, provides a comprehensive combined system of full GIS software and a Mobile Application which are fully compatible. Currently only Ordnance Survey GB, and Ordnance Survey Ireland maps are supported but others maps and more functionality will follow. Continued use of GPS running in the background can dramatically decrease battery life. If you experience any problems please contact our help desk in the first instance before posting any negative reviews. You should always provide alternative means of navigation, and not rely on the app in any role that is critical to the safety of life or property. This product does not support any maps purchased before 2015. The Quick Start guide for this app can be found at the link below: http://www.mapyx.com/user_manuals/MXMapMobileQuickStartGuideiOS.pdf