🔐 LinguaTube Privacy Policy
Last updated: January 11, 2026
Overview
LinguaTube ("the Extension") is committed to protecting your privacy. This policy explains how we handle your data when you use our Chrome extension for extracting, translating, and downloading YouTube video transcripts.
Data We Collect
Information You Provide
- Google Account Email: When you sign in with Google, we receive your email address to identify your account and manage your subscription status.
- API Keys: If you choose to use AI translation features, you may provide your own OpenAI or Volcano Engine API keys. These are stored locally in your browser.
Automatically Collected
- Usage Count: We track the number of videos processed per month to enforce free tier limits. This is stored locally.
- Subscription Status: Your premium subscription status is synced with our servers to enable cross-device access.
How We Use Your Data
- To authenticate your account and manage subscription status
- To enforce usage limits for free tier users
- To process translations using your provided API keys
Data Storage
- Local Storage: Settings, API keys, and usage data are stored locally in your browser using Chrome's storage API.
- Cloud Storage: Subscription status is stored in Firebase Firestore, linked to your Google account ID.
Third-Party Services
The Extension may interact with the following third-party services:
- Google OAuth: For user authentication
- PayPal: For subscription payment processing
- OpenAI / Volcano Engine: For AI translation (only if you provide your own API key)
- YouTube: To extract video transcripts from videos you are watching
Please review the privacy policies of these services.
Data Sharing
We do NOT:
- Sell or transfer your personal data to third parties
- Use your data for advertising or marketing purposes
- Share your data with any party except as required to provide the service
- Use your data to determine creditworthiness
Data Security
We implement appropriate security measures to protect your data:
- API keys are stored locally and never transmitted to our servers
- Authentication tokens are managed securely through Google OAuth
- Payment information is handled entirely by PayPal
Your Rights
You have the right to:
- Access your stored data through Chrome's extension settings
- Delete your local data by uninstalling the extension
- Request deletion of your cloud data by contacting us
Changes to This Policy
We may update this privacy policy from time to time. We will notify users of any significant changes through the extension or our website.