Memory Games

Common questions

Frequently Asked Questions

How many rounds are there?

Five rounds each day. Your average reaction time across all five determines your result.

What happens if I click too early?

Clicking before the box turns green records a false start for that round — it shows as "—" instead of a time. False starts are actually dropped from your average rather than counted against it: only if you false-start all five rounds does your average fall back to a flat 999ms, well past the 400ms line for a win. So one early click costs you a round, not your whole day.

Is the test the same for everyone?

Yes — each round's wait before the signal is randomized between 1 and 4 seconds using a daily seed, so everyone faces the same sequence of delays that day, but you still can't predict the exact moment it turns green.

What is a good reaction time?

Average human reaction time is around 250-300ms. Scoring under 400ms average is considered a strong result.

Does my result save?

Yes, your completed result is saved locally in your browser for the day.

Can I retry if I miss a round?

No — each day is one attempt across five rounds, just like the other daily games on this site.

How is this different from Human Benchmark's reaction time test?

The core mechanic is similar — both measure how fast you can click after a visual signal. The difference is format: Human Benchmark gives you unlimited retries to chase a personal best, while this is a daily challenge — everyone gets the same five-round sequence once per day, so your score is directly comparable to other players that day rather than to your own best-of-many attempts.

What does reaction time have to do with F1 race starts?

F1 drivers launch off a light sequence — five red lights illuminate, then go out together, and the race starts the instant they do. Reacting before the lights go out is a jump-start penalty, so drivers train specifically to react in the 200-300ms window right after the lights extinguish. That's the same skill this test measures, just without a car attached.

What is the ruler drop test, and how does it compare to this?

The ruler drop test is a low-tech way to estimate reaction time: a partner drops a ruler and you catch it, then you estimate your reaction time from how far it fell before your fingers closed. This test measures the same underlying skill but electronically and in milliseconds — no ruler or partner required, and it's precise enough to track small improvements over time.

Can you actually get faster at a reaction speed test with practice?

Somewhat. Reaction time is mostly determined by nervous system wiring and doesn't change dramatically, but staying alert, minimizing distractions, and resting your hand near the click area can shave real milliseconds off your average. Playing daily is a good way to track your trend rather than chase a single lucky round.

How precise is the millisecond timing — is it just reading the system clock?

No — each round's time is measured with performance.now(), a monotonic high-resolution timer built for exactly this, not Date.now() or the wall clock, so it can't be thrown off by a system clock adjustment mid-round the way a wall-clock reading could. That said, it's still measuring real elapsed time from signal to click: if you switch away from the tab right after the box turns green, the time spent away counts against you just like it would with a stopwatch, so a huge outlier round is usually a backgrounded tab, not a timing bug.

If I reload the page mid-round, do I lose my whole run?

Just that one round. Progress saves to your browser after each completed round, not while one is in flight — so reloading while the box is red ("waiting") or green ("click now") discards only that in-progress round; every round you'd already finished before the reload comes back exactly as recorded.

Can clicking right as the box changes color throw off the result?

No — every round is tagged internally with a counter that only advances when a new round actually starts. A click or a leftover timer from a moment ago only counts if its counter still matches the round currently on screen, so a stray timer firing late from a previous click can never overwrite the round you're actually on.

Next on the desk

More daily puzzles to play after Daily Reaction Test

Or browse all memory games on the site and the full daily game list.