# Privacy Policy for LECTURA Vocabulary Builder

**Effective Date**: July 8, 2026

## Data Collection

LECTURA Vocabulary Builder **does not collect, store, or transmit any personal data** from users.

- All vocabulary data (saved words, definitions, notes) is stored **locally** in the user's browser using `chrome.storage.local` and IndexedDB.
- If the user configures an LLM API key (optional), the key is stored **locally** and used only to communicate directly with the user's chosen LLM provider. The extension never sends this key to any third party.
- The extension makes **no network requests** to any server operated by the developer.
- No analytics, tracking, or telemetry is included.

## Third-Party Services

The extension uses the following third-party services, accessed **directly by the user's browser**:

- **ECDICT** (MIT License): An open-source English-Chinese dictionary bundled with the extension. No network requests are made to ECDICT servers.
- **LLM APIs** (optional, user-configured): If the user provides an API key, the extension communicates directly with the user's chosen LLM provider (DeepSeek, OpenAI, or Anthropic) solely for dictionary lookups. Refer to the respective provider's privacy policy for their data handling.

## Data Sharing

LECTURA does not sell, transfer, or share any user data with third parties.

## Contact

For questions or concerns, please open an issue on the [GitHub repository](https://github.com/Wayfinder-Lee/lectura-extension).

## Changes

Any changes to this privacy policy will be posted on this page.