Why progress goes missing
Guest progress lives in your browser, not your account. Clearing history, using private or incognito mode, or moving to another device or browser means that guest progress is not carried over.
How to keep progress safe
- Create an account or sign in before practicing.
- Practice in the same browser where you started if you have not yet signed in.
- Avoid private or incognito windows for lessons you want to keep.
Already signed in but missing data?
Make sure you signed in with the same account, since progress is tied to your profile. For how saving and syncing work, see progress tracking.