Home method to calculate the speed of the serve. Just not exact and faster have more margin for error but it's pretty reliable 80km/hy speeds between 150km / h. It also depends on the skill you have the person who is going to use this application. When using the stopwatch is recommended to use the thumbs of both hands and staring at the ball.
免費玩TENNIS Speed Service APP玩免費
免費玩TENNIS Speed Service App
TENNIS Speed Service APP LOGO
TENNIS Speed Service APP QRCode
| 熱門國家 | 系統支援 | 版本 | 費用 | APP評分 | 上架日期 | 更新日期 |
|---|---|---|---|---|---|---|
| 未知 | Android Google Play | 1.2 App下載 | EUR$0.0 | 1970-01-01 | 2015-03-09 |
