When you create a Violingo account:
- Email address (required for authentication)
- Encrypted password — never stored in plain text
- Account preferences and settings
- Authentication tokens with expiration, encrypted in transit
- Vocabulary words you save and their translations
- Flashcard review history and spaced repetition progress
- Learning statistics (words learned, streaks, session duration)
- Study preferences and learning goals
- Show title and episode information linked to vocabulary words you save
- Show title and episode identifier linked to vocabulary words you save
- Language display preferences
- Feature usage patterns and UI interactions
- Session duration and frequency
- Error logs (automatically anonymized)
- Browser type, OS, and extension version
- IP address (security only — not used for tracking)
- Subscription tier and billing cycle
- Credit balance and transaction history
- Billing email and country/region
- Last 4 digits of card (from Stripe — we never see full card numbers)
