REFLEXLAB
Every mode explained – what it tests, how it works, and how you're scored.
ReflexLab includes five cognitive benchmark tests: a reaction time test, a tap speed test, a Stroop effect test, a precision timing test, and a color memory test. Each mode measures a different aspect of how your brain processes, holds and responds to visual information. Here's exactly how each one works, what it measures, and how you're scored.
React to the color change
Classic mode measures your pure reaction time. A screen turns red – you wait – it turns blue – you tap as fast as possible. Your reaction time is measured in milliseconds from the moment the screen changes to the moment you tap. You do this for 5 rounds. Your session score is your best round, and your average across all five is shown alongside it. Learn more about reaction time →
Tap the screen to start a round.
The screen turns red. Wait – don't tap yet.
After a random delay, the screen turns blue.
Tap as fast as you can the moment it turns blue.
Repeat for 5 rounds. Your fastest round is your score.
Note: Tapping early restarts the round, and nothing is recorded for it. Reactions slower than 2000ms are marked as "Too Slow".
Simple reaction time – the speed of your stimulus-response pathway. Most sources estimate the average human visual reaction time at 200-280ms. ReflexLab uses 250ms as the baseline – the app's in-game tier system rates anything under 250ms as GREAT or better. The exact number varies by age, alertness, device, and test method.
Every reaction time test – whether on a phone, computer, or in a lab – adds some hardware delay. Your phone's display, touch sensor, and software processing all contribute a few milliseconds. For most phones this is roughly 20-40ms. Desktop browser tests typically add 30-80ms from mouse latency, OS event handling, browser overhead, and monitor refresh.
Neither gives you your true biological reaction time, but both are consistent enough to track improvement over time – which is what matters. ReflexLab uses millisecond precision timing to ensure your progress tracking is as consistent as possible.
Your tier comes from your best round of the five. Lower is better. Your average is kept too — it's what separates two players on the same best time on the leaderboard.
Note: ReflexLab uses a 10-tier rating system to give you a clear goal after every session. These are in-game ratings – they're designed to be fun and motivating, not scientific classifications.
Ranked by your best round (lower is better), with your session average as the tiebreaker. Every mode's board resets each Monday at 00:00 UTC.
Tap as many times as you can
Rapid Fire is a pure motor speed test. You get a 3-second window – when the signal hits, tap the screen as fast as humanly possible. Every tap counts. The total is your score. About tap speed testing →
Tap the screen to start.
Wait for the brief "GET READY..." countdown.
The screen turns red and says "TAP TAP TAP!"
You have 3 seconds to tap as many times as possible.
Your total tap count is your raw score.
Note: ReflexLab only counts one finger at a time – you can't cheat by mashing with multiple fingers. This makes the score a real measure of single-finger motor speed.
Motor speed and finger tapping rate. This tests the speed of your neuromuscular system – how fast you can repeatedly fire the same motor action. It measures physical throughput rather than reaction latency.
Based on normalized 3-second tap count. Higher is better.
Ranked by normalized tap count (higher is better). Requires Cloud Identity for global rankings.
Match text to ink color
The Stroop Effect was first described by psychologist John Ridley Stroop in 1935. It's one of the most well-known experiments in cognitive psychology and demonstrates how reading is an automatic process that's hard to suppress. ReflexLab turns this famous effect into a fast-paced game. What is the Stroop Effect? →
Start the 15-second session.
A word appears in a specific font and ink color.
If word name = ink color → TAP. This is a correct response.
If word name ≠ ink color → DON'T TAP. This is correct inhibition.
Correct taps give points; mistakes and misses add time penalties.
Be careful – 3 wrong taps ends your session early.
The Stroop Effect shows up in everyday life – when you're trying to focus on one thing while your brain automatically processes something else. In this mode, your brain naturally wants to read the text rather than identify the color, forcing you to suppress that automatic impulse.
Your rating comes from accuracy — your correct taps as a share of every moment you should have acted (correct taps + wrong taps + misses). Correct inhibitions aren't counted, because sitting still shouldn't pad your score.
Note: These tiers are ReflexLab's in-game rating system. They're designed to give you a goal to chase, not a clinical benchmark.
The leaderboard ranks Stroop differently, by Adjusted Score: avgCorrectMs + (wrongTaps × 150) + (misses × 200), lower being better, with accuracy as the tiebreaker. So the tier tells you how clean you were; the board also cares how fast.
Ranked by adjusted score (lower is better). Requires Cloud Identity for global rankings.
Tap when the ring is perfect
Phantom Ring is a visual-motor precision test. A target ring is shown at a random size between 60 and 160 pixels, then disappears. You must time your tap to when an expanding ring exactly matches that target's original size. The ring grows from the centre at a speed of 120 pixels per second. About precision timing →
Observe the target ring preview (500ms).
The target disappears. A new ring starts expanding from the centre.
Tap exactly when the expanding ring matches the target's original size.
Error is measured in pixels (px). 0px is a perfect hit.
Repeat for 5 rounds to get your average error.
Visual-motor timing and anticipatory control. Unlike reaction tests, this requires you to predict the intersection point using visual working memory and motion tracking.
Ranked by average error in pixels (px). Lower is better.
Ranked by average error in pixels (lower is better). Requires Cloud Identity for global rankings.
Remember the colors, not the squares
Flash Recall is a visual working memory test. Tiles on a 3×3 board light up one at a time in a set order. The board then shuffles, and you tap the colors back in the order they appeared. Because the tiles have moved, remembering where you saw something is no help — only the colors carry over. About color memory →
Tiles flash one after another. The first round shows 3 colors.
The board shuffles. Every tile keeps its color but changes place.
The board sits revealed for a moment so you can find the colors again, before the recall clock starts.
Tap the colors in the order they flashed. Nine tiles over eight colors means one color sits on two tiles — either one counts.
Clear a round and it continues. The sequence grows by one color every second round, and the flashes get quicker.
A miss replays the round. The third miss ends the run.
Visual working memory and its span — how many items you can hold in order, and for how long, while the scene changes underneath them. The shuffle is what makes it a memory test rather than a pattern test: it strips out spatial memory and leaves the colors on their own.
Ranked by the longest sequence you recalled in full. Higher is better. A round you missed scores nothing, however far into it you got. There are eight colors on the board, so eight is the ceiling.
Ranked by longest sequence (higher is better), then by total correct taps, then by faster average recall. Requires Cloud Identity for global rankings.
The eight colors are each a different everyday color word, so no two tiles are a shade of the same color.
One challenge a day – mode rotates daily
The Daily Challenge gives you one challenge a day at a rotating game mode — any of the five. Every player gets the exact same sequence – same timing, same targets, same everything. Play it, see your result, and keep your daily streak alive.
Check the daily rotation to see which mode is active.
Take the day's challenge. A day you never played stays open, so you can go back and fill it in.
The deterministic seed (date-based) ensures every player sees the same sequence.
Versatility and focus. Since you only get one chance, it tests your ability to deliver your best performance on your first try without the benefit of practice rounds.
Available on Google Play
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