Privacy policy

Last updated 3 November 2026

The models run entirely in your browser. The values you set with the sliders are kept in the page address so you can share them; nothing is sent to us.

We may use Cloudflare Web Analytics, which does not use cookies, to count page views. Cloudflare processes standard request data (such as IP address) to deliver and protect the site.

We also record anonymous usage counts for each page view so we can improve the pages: the page, the referring site, your country and device type, whether you moved a slider, which buttons you pressed, how far you scrolled and how long the page was open. This uses no cookies and no identifiers that last beyond the page. Add ?notrack=1 to any page address to turn it off in your browser.

If we add advertising in future, this page will be updated before any advertising cookies are used.