Privacy policy

Last updated 8 November 2026

• Calculator: runs entirely in your browser. The numbers you type are not sent to us or stored.
• Analytics: we use Cloudflare Web Analytics, which does not use cookies or track you across sites, to count page views.
• Purchases and free downloads: handled by Gumroad. Gumroad shares your name and email with us so we can deliver the product and send updates. You can unsubscribe at any time. See Gumroad's privacy policy for how it processes payment data.
• Contact: reply to your Gumroad receipt email, or message us through our Gumroad page. You can ask us to delete your data at any time.