How to play: Tap the box to start. When it turns from red to green, tap again as fast as you can. Do 5 tries to get your average; tapping while it is still red restarts that try. Your personal best is saved in this browser.
Tap to start
Wait for green, then tap
5 tries per round
–Average (ms)
–Best this round (ms)
–Personal best (ms)
Typical results: under 200 ms is very fast, 200–300 ms is average for a phone tap, over 350 ms is slow (or you were distracted).
How it measures: The timer starts the instant the box turns green and stops on your tap (pointer down, so it does not wait for the release). Results include your screen’s refresh delay and touch latency, usually 10–40 ms, so compare against yourself rather than lab figures. The random red delay (1.5–4 s) stops you from guessing the timing.