Distance Measure, the free utility developed by RBetjes, is a handy tool for calculating distances on a map.

Using this app, you can measure the distance between waypoints or the area defined by a polygon.

To perform such calculations, you need to select the first and second waypoint(s) and tap on the distance option in the options menu.

After that, just tap on the calculated distance to view your results and switch between meters, kilometers, feet, and nautical miles. You can also choose to change the map type if you prefer a different view.