How to play Reflex

How quickly can you react?

A quiet wait, then a quick response. Reflex records the median of five successful reactions, so one unusually fast or slow response doesn't dominate your score.

1. 01

   Wait while the stage says Hold. When it changes to Now, click, tap, or press Space.

2. 02

   Between trials, choose Try again when you're ready. An early response retries the same trial. Complete five successful trials.

3. 03

   Your score is the median reaction in milliseconds. Lower is faster.

Display, browser and input latency affect this measurement. Compare repeat attempts on the same setup.