Drop an object from a high height where you want to know how high it is and click on the green "Start" button to start the timer. Then, click on the red "Stop" button to stop the timer when the object hits the ground. It will give you an estimated height of the objects drop. Click on the green flag to reset. Disclaimer: The calculation is not exact and doesn't account for terminal velocity. This is just for fun, do not use for mass purposes or projects.
Credit to Mark Rober at youtube.com/Mark_Rober who makes fun science videos and one about . . . this.