Privacy

Updated October 18, 2026.

A simple website

This website has no contact form, advertising pixels, analytics scripts or added cookies. It uses session storage in your browser to remember when you dismiss the welcome message. Calculator entries stay in your browser and are not sent to us. Images load from this site. Fonts are requested from Google Fonts, which may receive technical request information such as your IP address; your browser uses fallback fonts if that service is unavailable.

When you contact us

If you email us, we receive your email address and whatever information you choose to send. We use that information to answer questions and handle support or refund requests. Please do not send card details or sensitive health information.

Purchases through Gumroad

Checkout and digital delivery are handled by Gumroad. Gumroad collects payment and order information under its privacy policy. We may receive order details, such as your name, email address, purchase, and refund status, to provide the product and support. This website does not collect your card details.

Hosting and retention

The website uses Cloudflare hosting, which may process technical request information such as IP addresses for delivery and security. Support and order records will be kept only as needed to provide service and meet applicable recordkeeping requirements.

Your information

Email us to ask about, correct, or request deletion of information we hold about you. Some records may need to be retained for legal or accounting reasons. Requests about information Gumroad holds should also be directed to Gumroad.