How these brain tests work
Want the data behind the scores? See our guides and benchmarks — including the average reaction time, what counts as a good WPM, and how to improve your reaction time.
ReflexStats packs eight of the most popular reaction time and brain tests into one place. Each one measures a different mental skill and gives you an instant score you can compare against the global average. Everything runs in your browser using high-precision timers — nothing is uploaded, and your best scores are saved locally on your device.
Reaction Time
Measures how fast you respond to a visual cue. Wait for green, then click. The average human reaction time is about 273 milliseconds; under 200ms is excellent.
Sequence Memory
Watch a growing pattern of tiles light up, then repeat it. Each round adds one more step. Most people reach level 8–10.
Aim Trainer
Click targets as fast as you can for 30 seconds. Competitive FPS players routinely score 60+ hits.
Number Memory
Memorize a number that grows one digit each level. Most adults hold about 7 digits.
Verbal Memory
Words appear one at a time — mark each as SEEN or NEW. Tests recognition span; the average score is around 40–50.
Visual Memory
Memorize which tiles flash white, then click them. The grid grows as you advance. Average is about level 9.
Chimp Test
Numbers appear on a grid, then hide — click them in order. Chimpanzees beat most humans; the average person stalls around 9 numbers.
Typing Test
Type a passage as fast and accurately as you can. The global average is about 52 WPM; touch typists hit 60–80.
FAQ
What is a good reaction time?
Under 250ms is good, under 200ms is excellent. The human average sits around 273ms.
How many numbers can the average person remember?
About 7 digits — the classic "magical number seven, plus or minus two."
Are my scores saved?
Yes, but only in your own browser via localStorage. Nothing is sent to a server and there is no account.
Is it free?
100% free, no sign-up, unlimited plays. The site is supported by ads.