Reaction Test
Click the instant it turns green. How fast are your reflexes, really?
Best: --
Tap to start
Click the instant it turns green. How fast are your reflexes, really?
Tap the box to start a round. It'll show red while you wait — click too early and you jump the gun. The moment it flips to green, click as fast as you possibly can. Your reaction time in milliseconds shows up instantly, and your fastest time ever gets saved so you've always got a number to chase.