Privacy

We collect what a purchase needs (email, payment handled by our payment processor; we never see your card) and what you type into an intake form for a custom model. We use it to deliver your order and answer support. We do not sell it, share it, or use it for advertising. Free tools on this site run in your browser; the numbers you type are not sent anywhere.

We count page visits, because we need to know whether anyone is finding the site. The counter is our own and the data never leaves our infrastructure. It sets no cookies and it does not track you across sites or across days. For each visit it stores one thing: a count for that page on that day. To avoid counting the same person twice in a day it derives a one-way token from your IP address, browser, and the date, then stores only the token. Your IP address itself is never written down, the token cannot be turned back into it, and because the date is part of it the token is different tomorrow, so it cannot be used to follow you over time.

Purchases are handled by Gumroad, which is the merchant of record and has its own privacy policy.

Email hello@numbersmithfinance.com to have your data deleted.