Reflexo

Reflexo is a clean, addictive reaction tester that measures how fast you really are. The screen turns red and you wait. The moment it flashes green, you tap as quickly as you can, and your reaction time is shown in milliseconds.

Tap too early and the round resets, so timing and patience both matter. Every attempt is saved against your personal best, giving you a clear target to beat and a simple, satisfying loop to keep coming back to. The minimal, full-screen design keeps you focused on the only thing that counts: your speed.

Great for a quick brain warm-up or a friendly challenge with friends, Reflexo has no accounts, no clutter and no ads. Tap to start and find out how sharp your reflexes are.