What this site stores
This browser stores your current and completed lessons, practice attempts, best results, revision suggestions, bookmarks, level-check recommendation, recently used tools, recent activity and display preferences. This information is not transmitted by Metron to an external service.
Browser storage and offline files
Learning data uses localStorage. A service worker caches pages and local assets to support offline reading. Storage can be cleared by your browser, private browsing session or device settings. If storage is blocked or full, the site continues with a temporary record and shows a notice.
Export, import and removal
My Progress lets you export your record as JSON, validate and import a Metron record, or clear learning progress after explicit confirmation. Display preferences are retained when learning progress is cleared. To remove all site data including preferences and offline files, use your browser’s site-data settings.
Hosting requests
Metron includes no analytics, advertising, third-party fonts or tracking scripts. Your browser must contact the hosting server to download pages. The hosting provider may keep ordinary request logs such as IP address and time under its own policies; these are separate from your learning progress.
Shared devices
Anyone using the same browser profile can view the stored progress. Export it if needed and clear it before leaving a shared device.