Test your response speed alone, race up to eight friends, or play a team relay. Each trial starts with an unpredictable wait followed by a green signal. Your browser measures from the visible cue to your input, so network travel is excluded from the result.
Tap Start trial, then wait. React only when the pad turns green and says GO.
Complete 3, 5, or 10 trials. Lowest average wins; everyone finishes before results are compared.
Early presses, interrupted or missed trials, and responses below 80 ms count as 2,000 ms. These games are casual and unrated.