Reaction Time Test

You play five timed rounds. Each round starts red (wait), then turns green at a random moment. Your reaction is the milliseconds between green and your tap. Early taps do not count — you retry that round.

Under 180 ms is Superhuman, under 220 Excellent, under 280 Good, under 350 Average. Slower times need practice. Leaderboard score is max(0, 500 − average ms) so lower latency ranks higher.

Yes. The full-screen tap target works on phones and tablets with no app install. Desktop players can use click, Space, or Enter.

A random delay between 1.5 and 4 seconds each round. You cannot predict the exact moment — waiting on red and tapping the instant it flips to green is the whole test. The five-round average is what ranks you.

The round shows Too soon and does not record a time. You retry that same round with a new random delay. Early taps never lower your average — they just cost a few extra seconds before you get a valid green.

Yes. Your best 5-round average is stored in this browser (localStorage) and shown on the menu as Best average in ms — it survives reloads. Clearing browser data resets it. No account needed.

Ranks: Superhuman <180ms, Excellent <220, Good <280, Average <350, else Needs practice. Leaderboard score is max(0, round(500 − average ms)), so every millisecond counts. Solo only. Free, tap or Space/Enter, no download.

No. Your result is the arithmetic mean of all 5 valid greens — no best-of-3 and no discarded slow tap. Too-soon retries never enter the average. Times are rounded milliseconds from performance.now() (floor 1 ms), so phone and display latency count. Best average in this browser updates only when the new mean is faster.