Reaction Time Test — check your speed in ms

How AimTests ensures accuracy

Timing uses the browser's high-resolution clock rather than Date.now(), so results do not drift when the system clock adjusts. The signal onset is timestamped on the frame the colour actually paints, not on the call that changed the state — a distinction worth up to 16 ms on a 60 Hz display. Every round then passes the three honesty checks above before it can be stored.

Why is my reaction time slower on mobile?

Phones add touch-sampling and display pipeline latency — typically 20–60 ms versus a 240 Hz monitor with a wired mouse. That is physics, not you. Compare mobile readings against mobile readings.

What is a good reaction time?

Most adults land between 200–300 ms. Competitive FPS players average 150–200 ms. The percentile shown with your result is currently computed from a statistical model, not from our own users — we label it model-based until there is enough real data to publish a genuine distribution.