價格：免費
更新日期：2019-02-10
檔案大小：3.0M
目前版本：1.0
版本需求：Android 5.1 以上版本
官方網站：https://sites.google.com/site/soapplab/
Email：deepforests2000@gmail.com
聯絡地址：480-1161 愛知県長久手市荒田１－１
I use it when practicing tennis serve.
When tennis serve enters, click "in button"
If faulted, click "fault button"
If you make a mistake, click "return button"
To start over from the beginning, click "Clear button".
It's a tool I made for myself, but I did not have a similar application, so I upload it.
It is a simple application, but since it is spending time as it is, it is charged.