Karttaselain - Maastokartta is an Android-based GPS navigation app that offers users a range of features to help them plan and navigate their travel routes. The free version of the app includes terrain maps, aerial and background map data, and property information. The app also provides users with their GPS location, tracking, compass, speedometer, and distance to destination. Users can save their favorite locations and routes and import and export them in GPX format. The app also provides detailed information on hiking trails, ski tracks, snowmobile trails, and over 18,000 other points of interest. The paid version, Karttaselain Plus, includes access to marine map data, the most comprehensive depth information, and continuously updated property information. The app is easy to use and offers a range of features that make it a must-have for travel enthusiasts.