Speed Gun is a tool in extended set of the Smart Tools collection (speedometer).
This app measures the speed of a moving object by touch like a velocimeter.
Usage is easy: To measure the speed, input the closest distance to the target, and touch the screen following target. Please measure the target distance in advance with a range finder tool (e.g. Smart Distance, Smart Measure).
It supports most android devices with rear camera. If the result is not accurate, you can calibrate your device with the [!speed!].
For more information, see the manual, Youtube video and the blog. Thank you.