Sharper reflexes,
measured to the millisecond.
Test your reaction time in the browser right now. Sign in when you want to keep your scores, track your progress and duel your friends.
WHY SIGN IN
Keep every run
Your times are saved to your history so you can watch your average come down week by week.
Compete globally
Get on the leaderboards by test and difficulty, both this week's board and all-time.
Duel your friends
Add friends, challenge them to live 1v1 rounds, and settle it head-to-head.
Duel anyone, on any device.
Duels run in real time between web, iOS and Android. The same stimulus fires for both players at the same moment, wherever they are. Your account, scores and friends are the same everywhere you sign in.
Matches involving a web player run in tap mode, since a browser can't read a punch.
Get the app
The iOS and Android apps add combat sports mode: your phone's accelerometer detects a real punch, and on iOS an Apple Watch can measure the strike from your wrist.
