Privacy Policy
Privacy-first measuring
Last updated: 1 October 2026
What this product is
ruleronphone is a static browser tool that draws calibrated rulers on your screen. It does not require an account.
Data stored on your device
Calibration values, preferred units, edge placement, theme, Hide Info state, and similar preferences may be stored in your browser localStorage (and similar client storage). This data stays on your device unless you clear site data.
What we do not collect
We do not upload your measurements. We do not sell personal data. The measuring canvas is ad-free. If hosting analytics are enabled by the deployment platform in the future, that would be separate from measurement content - this policy will be updated if that changes.
Cookies
Essential operation uses local storage for preferences. We do not use advertising cookies in the product UI.
Children
The tool is a general utility. Do not submit personal information about children via email contact.
Contact
Privacy questions: hello@ruleronphone.com.