Summary: This tool runs 100% locally in your browser. We do NOT collect, store, or transmit any personal data, measurements, or hardware identifiers. We use Google AdSense and Google Analytics which may use standard cookies.
1. 100% local processing
Régua Digital is an actual size screen ruler that runs entirely on your device. Your calibration (pixel density and chosen device model) is stored only in your browser's localStorage — it never leaves your phone or computer. We offer no accounts and ask for no name, email, or personal data to use the tool.
2. Data we don't collect
We do not collect, store, or transmit personal data, performed measurements, hardware identifiers, precise location, or screen contents. We don't sell data — simply because we have no data to sell.
3. Third-party cookies: Google AdSense & Google Analytics
To keep the tool free, we serve ads via Google AdSense and measure aggregate visits with Google Analytics. These Google services may use standard cookies and similar technologies to personalize ads, measure performance, and produce anonymous usage statistics, per Google's policies.
You can manage or disable cookies in your browser settings and adjust ad personalization at adssettings.google.com. Learn more at policies.google.com/privacy and policies.google.com/technologies/ads.
4. Your rights (GDPR)
Under the General Data Protection Regulation (GDPR) you have rights of confirmation, access, rectification, and erasure of personal data. Since we keep no user database, clearing site data in your browser removes any local residue (the saved calibration). For questions, reach us via our contact page.
5. Children
The tool can be used at any age to measure centimeters and millimeters on screen, with no sign-up. We do not knowingly collect data from children.