- Geographica: GPS map app which can use even offline. Geographica is a [Map Caching Offline GPS app] for mountaineering. Once you viewed a map image on the screen, that will be stored in your device. Therefore with this app you can check maps even in the wilderness without mobile phone signal or internet connection. Moreover, you can use GPS navigation offline. *Features -Cached Maps are usable even though offline. -Several types of maps available such as OpenStreetMap, etc. -Usable as GPS