Who runs the site.
Yolleg Ltd (10455920), 71–75 Shelton Street, London, WC2H 9JQ. Adults can contact Yolleg support about privacy or corrections. Please don’t include children’s identifying information.
Saved on your device.
We use browser local storage to keep up to 30 completed sessions: question factors, typed answers, time spent, hint use, session type and completion time. This supports progress and missed-fact practice. Active attempts stay in memory; refreshing or leaving ends them. Answers are not sent to our server.
Anyone using the same browser profile can see its saved record. Another device or browser profile has a separate record. Private browsing, clearing browser data or storage restrictions can remove or prevent saved progress.
Your controls.
On My progress, download a JSON backup, import a compatible backup after confirmation, or clear the saved record. Downloaded files may contain learning results; keep them private and manage or delete them on your device. We cannot restore a lost local record.
Website delivery.
Cloudflare and hosting.com deliver and secure the website. Requests can include an IP address, browser information, requested URL and time; providers may maintain operational and security logs under their policies. We do not add account cookies, advertising, analytics, location requests or social-media trackers. Provider security mechanisms may operate as part of website delivery.
Contact and external links.
Emailing support provides your email address and message, which we use to handle your request. Official-source links lead to external sites with their own privacy policies. Contact us for applicable data-rights questions; you may also contact the UK Information Commissioner’s Office.
Updated 5 October 2026.