The ‘Masurian Landscape Park'’ mobile application is a tourist guide to the southern part of the Masurian Lake District. The application includes walking and cycling routes as well as the canoeing routes on the Krutynia River. Each of the routes has been marked on the map offline. Thanks to GPS technology, users can see their exact location during their trip. The application suggests which places and sights are worth visiting. There is also a tourist guide containing tips on how to prepare for a