Reaction time
Tap at the signal and challenge your best
Getting your tool and preferences ready…
Tap when the panel turns green and says ‘Tap now!’.
Press the panel to start. On a computer, use Enter or Space too. A smaller number means a faster response.
No login. Last result and personal best saved on this device.
How to play
The signal changes after a random 2–5 seconds. Tapping the red panel ends the attempt without saving a time. Leaving the app or tab pauses the attempt. Personal bests stay on this device; clear saved device data in Settings to remove them. Joining rankings also submits eligible new attempts to the server.
This is a casual game: results vary by device, display and input method. It is not a health assessment.
Community rankings
Join without a login. Your nickname, game results and rank become public. Only new games started after joining are recorded; old local records are not uploaded.
Equal results share a rank. Rankings use the past year; server results expire after one year. This is a casual, device-reported leaderboard, not a tamper-proof competition.
Lower reaction time wins. Results under 100 ms and early taps are not ranked.