Privacy

Last updated 19 October 2026.

Without an account

You can read every lesson and take every test without signing in. Lesson progress and test attempts are stored in your browser only, using local storage. Nothing is sent to us.

With an account

Signing in uses your email address and a one-time link; we never see or store a password. We store your email, the profile details you enter (handle, display name, bio, website), your lesson progress and test attempts, the certifications you add with their proof files or links, the tips you post and the votes you cast.

Your profile, certifications with proof, and tips are public by design. Your email and test attempts are not shown to anyone.

Where it is stored

Data is hosted on Supabase in the European Union (Frankfurt). The site is served through Vercel. We use no advertising or third-party analytics trackers.

Your rights

You can edit or remove your profile details, certifications, tips and questions at any time from your account page, and delete your whole account there with one click. Deletion removes your profile, proof files, tips, questions, votes and exam history immediately.

Protection

Every table is protected by row-level security in the database, so your private data (email, exam attempts) is never readable by other visitors, and only you can change what you posted. Connections are encrypted, the site sends strict browser security headers, and the database is backed up on a schedule.