Karttaselain is an offline-capable terrain and marine GPS app that brings official topographic maps, aerial photos, urban street maps and basic property and depth data to your Android device, with optional Plus features for advanced charts and synchronized cloud storage. Whether you hike, boat, hunt or check property borders, Karttaselain bundles authoritative mapping, GPS tracking, GPX import/export and offline downloads so you can plan routes, follow tracks and view land parcels without a constant connection. The free base includes topographic and aerial maps for Finland and a basic marine chart; Plus adds professional-level depth and property updates.
Official, up-to-date topographic maps are provided by the National Land Survey for reliable outdoor navigation. Complete aerial imagery and detailed urban maps show streets, addresses and built-up areas. The app includes extensive hiking resources such as shelters, ski trails and snowmobile routes with tens of thousands of mapped locations. Core GPS functions offer accurate location, tracking, speed display, map rotation and compass-based direction to targets when device sensors are available. You can import and export places and routes in GPX format, open locations from other apps, and submit map feedback to suggest updates.
Offline map downloads and terrain and marine charts allow confident use without mobile data. Official datasets give high accuracy for topography, property boundaries and basic depth contours. The Plus subscription adds synchronized cloud storage, continuous property updates, more detailed marine depths and route planning tools, and a 14-day trial is available. Karttaselain offers flexible subscription options, multi-device use for a single user on up to four devices, and business licensing for teams.
Several advanced features, including comprehensive depth charts and continuously updated property records, require a Plus subscription. Compass rotation and directional guidance depend on your device having the appropriate sensors, and GPS accuracy depends on the device receiver. After the free trial, continued access to Plus features requires a paid subscription at the listed rates.
The app is developed in collaboration with an active user community and is maintained by a support team that welcomes feedback and assists with technical questions.
Recent updates added slope shading and forest orthophotos to the map options; these new layers are available to Plus subscribers or during the trial period and become accessible after updating the app to the latest release.
