Cookie Policy
Last updated: 14 February 2026
1. What are cookies?
Cookies are small text files stored on your device when you visit a website. They help the website remember your preferences and improve your experience. We also use browser local storage, which works similarly but can store more data on your device.
2. How we use cookies & local storage
We use the following types of cookies and storage:
| Type | Purpose | Required? |
|---|---|---|
| Essential cookies | Authentication session, cookie consent preference | Yes |
| Local storage | Flashcard progress, exam results, vocab scores, study preferences, onboarding state | Yes (for features to work) |
| Authentication cookies | Supabase session tokens to keep you signed in | Yes (if signed in) |
| Analytics cookies | Anonymised usage data to help us improve the site | No (optional) |
3. Essential cookies
These cookies are necessary for the Site to function. They cannot be disabled. They include:
- sn_cookie_consent — Remembers your cookie preference (accept/reject). Stored in local storage.
- Supabase auth tokens — Manage your sign-in session. Set only when you log in.
4. Local storage data
We store the following data in your browser’s local storage to power site features:
- Flashcard decks and spaced repetition schedules
- Exam practice responses and results
- Vocabulary quiz scores
- Onboarding completion state
- Search preferences
This data stays on your device and is not sent to our servers unless you are signed in, in which case it may be synced to your account.
5. Analytics cookies
We may use analytics cookies to understand how visitors use the Site. These cookies collect anonymised information such as pages visited, time spent, and general location (country level). You can accept or reject these cookies via our cookie banner.
6. Third-party cookies
When you sign in with Google, Google may set their own cookies. These are governed by Google’s Privacy Policy.
7. Managing cookies
You can control cookies in several ways:
- Cookie banner — Use the banner that appears when you first visit to accept or reject non-essential cookies.
- Browser settings — Most browsers allow you to block or delete cookies. Check your browser’s help documentation for instructions.
- Clear local storage — You can clear local storage through your browser’s developer tools (this will reset your flashcard progress and quiz scores).
Note: Blocking essential cookies may prevent parts of the Site from working correctly.
8. Changes to this policy
We may update this Cookie Policy from time to time. Changes will be posted on this page with an updated date.
9. More information
For more details about how we handle your data, see our Privacy Policy. For questions, contact us at hello@straightnines.com.