Privacy Policy

Last updated: October 2026

What we collect

• Learning progress (completed lessons, XP) — stored in your browser (localStorage) and, once you sign in, in your account.
• Account data — the email and display name you provide when signing up. Stored by our provider Supabase.
• The code you write runs on your device and is not sent to our servers.

Cookies, analytics and ads

We use analytics to understand traffic and show ads from Google AdSense and Yandex Advertising Network. These services may use cookies to show relevant ads. You can decline non-essential cookies in the banner on your first visit.

Learn more: How Google uses information from sites that use its services.

Your rights

You can ask us to delete your account and data at any time via the Contact page.