Privacy and storage
The app saves lesson progress and your notes locally in this browser. They do not sync across devices. Full access requires an email. See our shared registration policy below.
Clearing browser data may remove this information. If storage is disabled, you can still read and take quizzes.
We have not added advertising trackers or analytics tools. The hosting provider may process technical data to operate and control access to the service. External links follow the policies of their respective websites.