Privacy Policy

Effective Date: January 1, 2026

1. Information We Collect

Real Online Ruler is a client-side web application. We do not collect, store, or transmit any personal data, measurements, or calibration settings to our servers. All calibration data is stored locally in your web browser using localStorage.

2. How We Use Information

The local data saved by your browser is used exclusively to remember your preferred unit of measurement, screen calibration settings, and theme preferences (light/dark mode) for your next visit.

3. Cookies and Analytics

We may use basic analytics services to understand how visitors interact with our website to improve user experience. These services may set necessary cookies. We do not use these for personalized advertising.

4. Changes to This Policy

We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated effective date.