This simulator gives speed estimation of objects in front of you. It pretends to be a speedometer and measuring speed of cars, people and other moving things. You can tell friends that you have built-in speed gun using laser technology to make speed measurement on moving objects.
Place your phone horizontally and place the top of the screen towards moving car. Then click 'measure speed' and wait while our simulator will show you approximate speed of the car next to you. App does not use laser to check speed. It's just a prank!