The short version
This site is static HTML. There is no account to create, no newsletter, no comment box, and no form that sends anything anywhere. The picker and the calculator run entirely in your browser and the numbers you type are never transmitted.
Hosting logs
Pages are served by Cloudflare Pages, which keeps standard request logs: IP address, time, the page requested, the browser string. That is infrastructure logging common to every site on the web and we do not mine it or tie it to a person.
When you follow a buy button
A buy button opens the product listing in a new tab. Anything recorded about you from that point on is covered by the privacy notice of the page you land on, not by this one. Nothing you typed on this site travels with you.
Counting visits
Page views are tallied in our own log: the page address, the page title, the referring link, the browser language and the screen size. There is no cookie, no advertising pixel, no third-party analytics and no consent banner, because none of that is here to consent to.