Cookie Policy
Last updated: January 2026
1. What Are Cookies
Cookies are small text files stored on your device when you visit a website. They help the site remember your preferences and improve your experience. We also use browser local storage for similar purposes.
2. Cookies We Use
| Name | Purpose | Duration | Type |
|---|---|---|---|
| next-auth.session-token | Authentication session | Session | Essential |
| next-auth.csrf-token | CSRF protection | Session | Essential |
| next-auth.callback-url | Redirect after sign-in | Session | Essential |
3. Local Storage
We use browser local storage (not cookies) for the following:
| Key | Purpose | Type |
|---|---|---|
| bc-preferences | User display preferences (theme, locale, layout) | Functional |
| bc-progress | Study progress tracking (cards studied, streaks) | Functional |
| bc-analytics | Anonymized usage analytics events | Analytics |
4. Managing Cookies
You can control cookies through your browser settings. Disabling essential cookies may prevent you from signing in or using certain features. Local storage can be cleared through your browser's developer tools or settings.
5. Contact
For questions about our cookie practices, please reach us through our Feedback page.