Topographic maps made by Ordnance Survey are the best outdoor maps for Great Britain.
A topographic map contains many details like height contours, small roads and land usage and is thus ideal for navigating outdoors.
In the Topo GPS app you can purchase the best topographic maps of Great Britain, the OS Explorer 1:25.000 maps. Topo GPS is an official partner of Ordnance Survey.
OS Explorer maps in Topo GPS costs £0.79 for 4 squares of 4 x 4 km which you can choose. Free lifetime updates are included. It is also possible to purchase a yearly subscription to whole Great Britain for £24.99.
You can make the topographic maps offline available. In this way you are sure that the maps you need are always accessible.
The topographic map has a clear legend with explanations of all symbols.
The Topo GPS app offers many additional useful features to the topographic map. Like navigating, loading, planning and following routes and adding points to the map. Topo GPS contains all functions of a regular GPS device.