Quickly measure the heights of buildings, trees, stomp rocket flights, etc., by first pointing the camera at one end of the object and then the other. Doubles as a simple camera clinometer that can use either the back or the front camera. Other height-measuring apps may require you to enter the distance to the object ahead of time, or to tap first on the base of the object and then the tip, which makes them not work well for all applications (e.g., stomp rocket flight height measurement). Two