Cookies & Storage Notice

This notice describes the browser-side storage MandarinLand currently uses, why it uses it, and how to manage or delete that data on your device.

Effective date: March 30, 2026

1. Scope

MandarinLand uses cookies and similar storage technologies to support core app behavior, offline study features, and device-side caching. This notice is intended to cover cookies, localStorage, IndexedDB, service workers, and related browser cache behavior.

2. Current Storage Mechanisms We Use

Cookie: sidebar_state. Used to remember whether the sidebar is open or collapsed. Current max age in the codebase is 7 days.
localStorage for chat suggestions. Keys are prefixed with chat-suggestions: and are used to keep suggested replies tied to a chat on the current device.
localStorage for Explore progress. The current code uses ml-village-v1 to store local Explore game state on the current device.
IndexedDB for offline flashcards. The current code uses an IndexedDB database named mandarinland-flashcards to store deck data, review queues, and offline review outbox items.
Service worker and browser caches. MandarinLand registers /sw.js in supported browsers and uses it to cache static assets, selected API responses, and audio files for offline or low-connectivity use.

3. Why We Use These Technologies

To remember app state and UI preferences on your device.
To support offline study flows, cached decks, cached queues, and queued sync actions.
To support offline or replayable audio for readers and dialogues where those features are enabled.
To improve resilience and load performance for assets and selected same-origin content.

4. Non-Essential Cookies and Consent

As currently implemented, MandarinLand's repo shows storage being used for app functionality, device state, and offline features rather than advertising or third-party analytics cookies.

If MandarinLand later adds non-essential analytics, experimentation, session replay, personalisation tracking, or advertising technology, this notice should be updated and a consent mechanism should be added where law requires it.

5. How To Manage or Delete Stored Data

You can clear cookies and site data through your browser settings.
You can remove localStorage and IndexedDB data through browser storage tools or by clearing site data for MandarinLand.
You can unregister the service worker and clear caches through developer tools or browser site settings.
Some features may stop working correctly if you remove essential storage used by the app.

6. Contact

Questions about this notice can be sent to [privacy@your-domain.com].