Question 1

Is my data private?

Accepted Answer

Absolutely! The Reaction & Speed Test runs entirely in your browser. Only your personal bests are stored locally in localStorage. No data is sent to any server.

Question 2

How accurate is the timing?

Accepted Answer

We use performance.now() which provides microsecond precision. Results are rounded to the nearest millisecond for display. This is the same timing API used by professional benchmarking tools.

Question 3

Can I use this offline?

Accepted Answer

Yes! After the page loads once, the entire tool works offline. Your personal bests are saved locally and persist across sessions.

Question 4

What's a good reaction time?

Accepted Answer

Elite: ≤200ms, Great: ≤250ms, Good: ≤300ms, Okay: ≤350ms. Average human reaction time is around 250-300ms. Professional gamers and athletes often score under 200ms!

Question 5

How does the share link work?

Accepted Answer

When you share a result, we generate a URL with query parameters (e.g., ?m=reaction&rt=243). Anyone clicking the link sees your exact score as a static preview.