Private browser progress
Continue using the complete program without registration. Progress, saved terms, and certificate references remain in this browser.
Transfer method: export a JSON backup on the Progress page and import it on another browser.
Guest progressSaved in this browser only. A Sync ID account is optional.
Account and progress synchronization
Choose private browser-only guest progress or an optional Sync ID account with no email address.
Automatic multi-device synchronization
Create a private account with a generated Sync ID, passphrase, and eight one-use recovery codes. No email address or location is collected.
Guest progress remains complete
An account is not required to earn levels or certificates. Registration adds synchronization and recovery convenience without changing the educational content.