How to play
- Tap the box to start. It turns red — wait.
- When it turns green, tap or click immediately.
- Tapping too early counts as a false start. Your average over five rounds is your score.
Questions
What is a good reaction time?
Most people average between 200 and 300 milliseconds on a computer. Under 200 ms is excellent. Phones add a little delay from the touchscreen, so phone scores are often 20–40 ms slower.
How can I improve my reaction time?
Sleep well, stay hydrated, and practise in short sessions. Using a wired mouse and a fast-refresh screen also lowers measured delay.