dual Stopwatch Light 1.0 at App Store analyse

This DualStopWatch is the first stopwatch which gives a sign to the athletes at the starting line to get ready.
When you start this stopwatch on your iPhone, the built-in Light will be activated.
Starting the countdown timer the Light just light for 3 secs. and a start-up sound will be heard.
If the Light light turns off and the startup sound is over the athletes should start the race immediately.
This special stopwatch has two timers, which can be used to stop the first and the second athlete or even if there are more than two (of them) you can stop the first and the last one, the time difference will be displayed here instantly.
But you can also ignore the second timer to stop only a single athlete.