Reaction Time Test: Reflexes

Three short tests. One profile. Three minutes.

REACTION
Six trials. Tap the moment the screen turns green. We take the median, not your fastest single trial — one lucky tap is not a measurement. False starts are recorded, not ignored.

MEMORY
A grid lights up in sequence. Repeat it. The sequence grows until you miss twice in a row. What you get is your visual span — the number of items you can hold at once.

LOGIC
Twelve matrix problems. Each grid follows rules — rotation, progression, alternation, superposition — and you pick the cell that completes it. Difficulty comes from how many rules run at once, never from a time limit.

WHAT YOU GET
A profile card with three bars, not a single number. A single number gets bragged about and forgotten; a lopsided profile makes you want to compare. Share the card with one tap.

HOW THE RANKING WORKS
Your reaction rank comes from published norms (Der & Deary, 2006 — 7,130 adults). Memory and logic have no ranking yet, and the app says so instead of inventing one. They open up once enough people have taken the test.

WHAT THIS IS NOT
This is not a clinical or diagnostic tool. It does not measure intelligence, and it makes no claim about your health. It measures three specific abilities, on this device, at this moment of the day.

NO ACCOUNT, NO SIGN-UP
Everything runs on your device. No login, no email, no personal data collected.

REACTION TIME TEST — WHAT IT MEASURES

Reaction time is the gap between a stimulus and a response. Simple reaction time (one signal, one button) averages around 200-250 ms for healthy adults. The test here uses six trials and takes the median to reduce the effect of lucky single taps or momentary distraction. False starts — pressing before the signal — are counted, not excluded, because excluding them rewards guessing. The reaction rank is drawn from a published dataset of 7,130 adults, so the comparison is to real data, not to a leaderboard.

VISUAL MEMORY SPAN — HOW THE TEST WORKS

A grid of squares lights up in a sequence. You watch, then repeat the sequence by tapping the same squares in order. Each correct round adds one more square to the sequence. The score is your visual memory span — the number of items you can hold and recall in order. This is a version of a spatial working memory test used in cognitive research. No time pressure; difficulty comes entirely from sequence length.

LOGIC TEST — MATRIX REASONING

Each puzzle shows a 3×3 grid with one cell missing. The cells follow rules — rotation, mirroring, progression in shading, combination of elements, alternation of pattern. Your task is to pick the cell from four options that completes the grid. Difficulty comes from how many rules run at once, not from a clock. This measures fluid reasoning — the ability to identify patterns without prior knowledge of the specific material.

PRO SUBSCRIPTION
The core tools stay available without paying. Pro starts with a 7-day free trial, and ads keep showing during that trial. After it ends, the weekly subscription renews automatically and removes the ads. Cancel any time in Google Play.

If you already bought the Pro version, it stays yours for life, with no subscription.

BRAIN SPEED TEST — WHO USES IT AND WHY

Athletes use reaction time tests to benchmark performance and track recovery after fatigue or concussion. Older adults take the test as a personal benchmark year over year. Students take it after poor sleep to see the effect on their cognitive profile. The three-part format — reaction, memory, logic — gives a more complete picture than a single-number estimate.

COGNITIVE SPEED AND WORKING MEMORY — WHAT AFFECTS YOUR SCORE

Reaction time is fastest in the late morning, slowest in the first hour after waking. Caffeine shortens it by 10–30 ms on average. Fatigue and alcohol slow it significantly. Visual memory span decreases under high cognitive load. Run the test under different conditions to see how your profile shifts.