Privacy Policy

Last updated: 2026

What we collect

Almost nothing. The reaction time test runs entirely in your browser. Your scores are saved in your browser's localStorage and are never sent to our servers. We don't have an account system.

Third parties

We use Google AdSense to display ads. AdSense may set cookies or use device identifiers to serve relevant ads. See Google's advertising policies for details. You can opt out of personalized ads in Google Ads Settings.

Analytics

We may use privacy-friendly, aggregated analytics (such as Vercel Web Analytics) to understand traffic patterns. These tools do not identify individual users.

Your data

Your best reaction time score lives in your browser's localStorage. To delete it, clear your browser's site data for this domain.

Contact

Questions about privacy? Reach us through the contact details on our parent project.