You can freely distribute videos that use this app and videos that use it. If you contact us with the URL of the video, we will introduce it in the help, so please contact us by email or review. How to play 1) Place the phone with the camera facing on a track lane. Keep it still. 3) Press start, the timer will start when the car passes. (You don't need to calibrate.) Q&A Q. Can be calibrated when it is started, if the terminal is moved, how to calibrate again? A. You can be done from the cali