Nothing. Both calculators run entirely in your browser. No measurements, settings, or values you enter are sent to any server. There are no accounts, no login, no analytics, no tracking scripts, no cookies set by these pages.
When you use Save Setup, the resulting JSON file is created within your browser and downloaded directly to your device — nothing touches a server at any point. When you load a setup file, it is read locally by your browser.
Both calculators load Three.js from the Cloudflare CDN (cdnjs.cloudflare.com). This is the only external network request either page makes. Loading a file from any CDN means Cloudflare's servers see the request, subject to Cloudflare's own privacy policy. The integrity of the loaded file is verified via a Subresource Integrity hash embedded in the page.
These pages are served as static files. Depending on the hosting provider, standard web server logs (IP address, requested URL, timestamp, user-agent) may be retained by the host for operational purposes.
Questions about this policy: contact us.
Last updated: July 2026.