iPhone Screenshots
Description
The app calculates and displays the depth of wells, cliffs, and other vertical drops. It also shows the speed of a falling object at any given moment.
Well, cliffs, skyscrapers...
Drops something and you hear when it touches the ground. iPhone will say the depth of the well, cliffs or other.
If you rely on sight. the program displayes depth and speed, at the moment, of the body in freefall.