Privacy & analytics.

• Page views and reading time: the page, referrer and campaign tags, device type, browser, screen size, approximate country/city (from the request, the IP address itself is not stored), time actively reading and how far you scrolled.
• Learning events: lessons opened and completed, sections read, quiz and trial answers, searches (length only, never the text), shares, "Ask AI" clicks, games played.
• If you sign in: your email, name and avatar from the sign-in provider, plus your progress, streaks, notes, bookmarks and comments, so they follow you across devices.

• First-party analytics (always): sent to this site's own API and stored in its database (Supabase).
• PostHog (active): product analytics, heatmaps and session replay. Requests go through this site's own domain. Signed-in visitors are linked to their account ID and email so I can follow a learner's journey and help when something breaks.
• Google Analytics 4 (active): aggregate traffic reports. Advertising features, ad personalisation and ad storage are switched off (Consent Mode: ad_storage denied).
• Vercel Web Analytics: cookie-free page counts from the hosting provider.

A replay is a reconstruction of the page (not a video of your screen): clicks, scrolling and page changes. Everything you type is masked: email and code fields, notes, comment drafts and every other input appear as asterisks. Pages under /admin are never recorded. Recordings are kept for about a month, then deleted by PostHog.

• Use the switch at the top of this page (or "opt out" in the footer). It stops all three analytics tools in this browser.
• Turn on Do Not Track or Global Privacy Control in your browser: the site then sends nothing to PostHog or Google.
• Reset your learning progress any time from your progress page.
• To delete your account and its data, or to ask what is stored about you, email kukreja.him@gmail.com.