Types of cookies
Essential cookies
Required to keep you signed in, maintain security, and remember your consent choices.
Performance cookies
Help us understand how features are used so we can prioritize improvements. These are anonymous and aggregated.
Preference cookies
Store your study settings, preferred difficulty, and interface preferences.
Managing cookies
You can adjust or withdraw consent at any time via your browser settings or by clearing cookies. The contact page is the fastest way to request deletion of stored preferences.
Updates
We may update this policy as analytics practices evolve. Changes will be posted here and reflected in the cookie consent prompt.