What is stored
Your calibration, unit and jaw positions are saved in your own browser storage on this device so the ruler is ready next time. Clearing your browser data removes them.
What we collect
No accounts and no tracking cookies. Visits are counted with Cloudflare Web Analytics, which sets no cookies, does not follow you across other sites and never sees what you measure. The site is served by Cloudflare, which keeps standard short lived server logs to run and protect it, and fonts load from Google Fonts. If this ever changes, this page will say so first.
Last updated 2026-11-12.