Official topographic maps are the most suitable outdoor maps for Czechia.
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 ZM 50 topographic map of the Czech Republic at scale 1:50,000. ZM 50 is produced by ČÚZK, the national mapping organisation of the Czech Republic.
Full access to the complete ZM 50 topographic map of the Czech Republic in Topo GPS costs €3.99. This is a one time purchase and includes future updates. The map is available on all devices that share 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 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.