ReactionTimeTest is a fast and fun way to check how quick your reflexes really are. The concept is simple: wait for the screen to change color, then click as fast as you can. Your reaction time is measured down to the millisecond, and you can try as many times as you like to improve your score. It’s a great tool for gamers, athletes, or anyone curious about their mental sharpness—no downloads, no sign-ups, just pure reflex testing. Visit for more: https://reactiontime-test.com/