Privacy Policy

Last updated: July 4, 2026.

Euclid's Workshop, published by Spearhead Analytica, LLC, is built to respect your privacy. The website has no accounts, no sign-up, and no forms. We do not collect your name, email, or any other personal information when you browse.

What stays on your device

Your preferences (such as the difficulty toggle and your progress through the proof challenges) are stored in your browser's localStorage. This data never leaves your device and is never sent to us. Clearing your browser storage resets it.

Analytics

We use Vercel Analytics to understand which pages are visited so we can improve the site. It gathers aggregated, privacy-friendly usage data and does not use cookies or build advertising profiles. It does not identify you personally.

Purchases

When you buy the teaching curriculum, the sale is handled entirely by Gumroadas the merchant of record. Gumroad collects the email and payment details needed to process your order, and its handling of that information is covered by Gumroad's own privacy policy. We never see or store your card details.

Contact

Questions about your privacy? Email us at hello@euclidsworkshop.com.

A project by Spearhead Analytica, LLC.