MMK21
★★★★★
"A practical app with lots of possible use cases. The UI is friendly and intuitive, as I`d expect from the people behind StreetComplete. More importantly, it gives spot-on horizontal and vertical measurements (use the button in the corner to swap modes). When measuring heights, the starting point can sometimes float above the ground, but after moving your phone around a bit it `locks on` and stays right where you placed it."
Version: 1.2