Test your reflexes. Wait for the screen to turn green, then click as fast as you can. See your time in milliseconds, plus your average and best.
A typical human visual reaction time is around 200 to 300 ms. Anything under 200 ms is fast. Click before the screen turns green and it counts as too soon.
Click to start, then wait. The box turns red, and after a random delay it turns green. The moment it turns green, click as fast as you can. The tool measures the milliseconds between the green and your click.
A typical visual reaction time is about 200 to 300 milliseconds. Anything below 200 ms is fast, and around 150 ms is near the human limit for reacting to a visual cue.
You clicked while the box was still red, before it turned green. Wait for the colour change, then click.
No. Your tries are kept only on the page while it is open and are never uploaded.