B-Speed Gun

A short form speed gun.

Method
1 and the distance I'd like to measure are established. (Baseball: Adult 60.6ft Child 14ft)
The moment 2 and a ball were given up, I keep pushing somewhere of a screen.
If a ball arrives at 3 and the established distance, a start button is separated.
4 and the speed shown to a screen are your velocity of pitching.

The thing into which event recording function is loaded can take out the average velocity of pitching.
When I swipe at the numerical value I'd like to put out to the left from the right, a Delete button is indicated, and when a button is pressed, it's possible to put it out.

※ Please use it by the standard degree thoroughly.