Official topographic maps are the best outdoor maps for Spain.
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 buy access to the full topographic map of Spain, the mapa raster. This official map is produced by the national geographic institute of Spain (IGN).
Full access to the complete topographic map costs €3.99. This is a one-time purchase. Free future updates are included. The map is available on all devices that use the same Apple ID or Google Play account.
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.