Every calculation runs in your browser. The prices and costs you enter are not sent to us or to anyone else, and nothing is stored after you close the page.
The site sets no cookies and uses no analytics, advertising or tracking scripts, and loads nothing from other websites.
Like any web server, ours writes technical access logs (IP address, time, requested page, browser identification) to keep the site running and secure. The logs are deleted automatically after 10 days and are not shared.
Links to eBay, Amazon, Etsy and other sites lead to their own pages and privacy rules.