Interval Timer[3 Seconds (Whistle2)10 Seconds (Whistle)]

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3 Seconds (Whistle2)10 Seconds (Whistle)Interval Timer

The Features of Hinokoto Interval Timer

You can call up the popular interval timers with one click. So you can use it soon for training, studying, etc.
You can specify the time until the interval timer starts to turn. So you can have time to prepare for muscle training, running, etc.