App for start practice for swimmers.
Push start and out the sound “whistle” -> “Take your marks” -> (start sound).
The interval between “Take your marks” and “start sound” is random.
Take Your Marks – for swimmers – is available on the following site:
play.google.com
![](http://b13.app/wp-content/uploads/pz-linkcard/cache/5c6137e948ae415592d6ddaf5a44e967369874158a5824c69a1921e298de281d.jpeg)
https://play.google.com/store/apps/details?id=com.piromayo.takeyourmarks&...
![Get it on Google Play](https://play.google.com/intl/ja/badges/static/images/badges/en_badge_web_generic.png)