Progress is saved in this browser for this copy of the course when browser storage is available. Export a backup before moving the folder, switching browsers, or clearing browser data.

Import replaces the current progress only after the file is accepted and you confirm. No file is uploaded.

You're using the installed app.

On iPhone: open this website in Safari, tap Share, then Add to Home Screen. If offered, leave Open as Web App enabled.

Open the Home Screen app once while connected and wait for Offline ready. Then all downloaded chapters work without a connection.

An update won't reload your quiz without your choice. The hosted app and a desktop ZIP have separate browser storage. Use progress export/import to transfer between them.

iOS can clear website data. Keep a backup, and reconnect to download the course again if needed. Official documentation links still require internet.