Privacy Policy

Measurement Data

All measurements are processed by JavaScript inside your browser. Answers, results, and screen calibration values are never sent to a server.

Browser Storage

We store your theme, last chosen mode/target, screen calibration values, and recent result history (up to 60 entries) in this device's localStorage. You can delete this anytime with the Clear Records button or your browser settings.

Ads and Cookies

Kakao AdFit ads may be displayed to support running the site. The ad provider may use its own cookies or similar technologies for ad delivery and measurement, governed by that provider's own privacy policy.

Offline Cache

For faster repeat visits, a service worker caches only static files like styles and scripts. Measurement results are never cached.

Contact

For privacy-related inquiries, please email us at the address on the Contact page.