Reaction Time Test: ReflexLab

How fast are your reflexes? Most people react in about 250 milliseconds. Some are faster. ReflexLab tells you exactly where you stand.

THE BOARD RESETS EVERY MONDAY

ReflexLab wipes its leaderboards every Monday. Five boards, one per mode, a countdown on each. Last week is gone and this week is open. You could win it.

FIVE TESTS, ONE LAB

CLASSIC · reaction time test

Wait for the signal. Tap the instant it turns blue. Five rounds, and your fastest is the score. Tap before the signal and the round starts over.

RAPID FIRE · tap speed test

Three seconds. As many taps as your finger can land.

STROOP · a real Stroop test

The word GREEN, printed in red ink. Tap only when word and ink agree. Fifteen seconds of your brain arguing with itself.

PHANTOM RING · precision timing

A ring flashes, then grows toward the mark. Tap the moment they meet. Scored in pixels: land within 8 and it's rated PERFECT.

FLASH RECALL · color memory

Colors flash in order, then the board goes blank. Tap them back. Every second round adds a color and shortens the flash, up to a sequence of eight. You get three misses.

DAILY CHALLENGE

One challenge a day, the same sequence for everyone, so the scores actually compare. Keep the streak alive and fill in the month's calendar.

MEASURED, NOT GUESSED

Every session is timed to the millisecond and saved on your device. The Performance chart answers one question: are you getting faster? The Activity grid shows every day you trained. Reaction training only counts when the number moves.

SHARE THE NUMBER

Every result exports as a score card. Send it to the friend who swears they're faster.

ReflexLab works offline, needs no sign-up, and is free. Install it and find out what your milliseconds are.