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Cookie Policy

Last updated: October 17, 2026

1. Essential cookies

These are needed for the site to work and are always on:

  • sb-*-auth-token: Keeps you signed in (Supabase).
  • zk_consent: Remembers your cookie choice for 180 days.
  • Theme and currency: Remember your display preferences.
  • __cf_bm, cf_clearance: Bot protection on forms (Cloudflare Turnstile).

2. Analytics

Analytics tells us how many visitors view a course, create an account, start checkout and buy, so we can see where people drop off. It is our own, stored on our servers and shared with no ad or analytics company. It only starts after you choose “Accept analytics”, which sets one cookie:

  • zk_vid: a random visitor id that ties those steps together, kept for 180 days.

Choosing “Essential only” keeps analytics off, and switching to it later deletes the cookie.

3. Error reports

When a page breaks, an error report is sent to Sentry so we can fix it. Reports set no cookie, and personal details are removed before they leave your browser.

4. Your choice

Checking your current choice.

5. Contact