Privacy Policy
What we collect
Almost nothing. 21learn.org runs no third-party analytics, no advertising trackers, no session recording, and no social media scripts. Pages load no external fonts or embeds; the network tab of your browser will confirm this on any page. We do not set tracking cookies. The site stores one value in your browser's local storage to remember your paper or reading-lamp theme preference; that value never leaves your device.
What the hosting layer sees
The network host that serves this site may log standard request metadata, such as IP address, user agent, and the path requested, for security and abuse prevention. That is true of any modern website. We do not enrich, resell, or cross-reference those logs.
If you write to the editors, we keep the correspondence for as long as the editorial matter it concerns stays open, then delete it. Addresses are never added to any list; there is no newsletter to be added to.
Your rights
You may ask what information we hold about you (normally: nothing, unless you have emailed us), ask for it to be corrected, or ask for it to be deleted. Write to the address on the contact page.
Changes
If this policy changes, the change appears on this page with the date of the revision. This version was published in 2026 with the site's restoration.