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 click through to a retailer
The buy buttons open Amazon with an affiliate tag attached. Amazon records that you arrived from here, usually with a cookie, so that a qualifying purchase is credited to this site. What they collect after that is covered by their privacy notice, not this one. We receive commission reports that count sales and show no customer details.
Cookies we set
None. There is no analytics script, no advertising pixel and no consent banner to dismiss, because there is nothing to consent to.