Privacy
Short version: your watchlist and progress stay on your device. We don't have accounts, and we don't collect personal data.
What is stored on your device
Your watchlist, completed lessons and the last lesson you opened are saved in your browser's local storage, so the site can show your progress. This data never leaves your device. You can clear it from My courses or by clearing your browser data.
If you install the app, your browser also keeps copies of pages you've visited so they open offline. Videos are never stored.
YouTube
Lessons use YouTube's privacy-enhanced player (youtube-nocookie.com), and the player loads only when you press play. Lesson thumbnails are loaded from YouTube's image servers. Once a video plays, YouTube's own privacy policy applies.
Analytics
We use Cloudflare Web Analytics to count page visits. It sets no cookies, does not track you across sites and does not identify you.
Error reports
If something breaks on a page, your browser sends us a short technical error report (the error message and the page address, without any query string) so we can fix it. We don't store your IP address, and the reports are not linked to you.
Questions
Ask on our contact page.