This Privacy Policy explains how Matheu (“we”, “our”, or “us”) collects, uses, and protects information when you use the NeoCards mobile application.
1Information We Collect
a. Account Information
- Email address (for authentication)
- User ID (generated by Firebase Auth)
We use Firebase Authentication to secure your account and allow you to access your data across devices.
b. User Content
- Decks created
- Flashcards (front/back text, learning status)
- Review history (Spaced Repetition data)
- Language preferences (Source and Target languages)
This data is stored in Cloud Firestore to sync your progress across devices.
c. Purchase Information
- Transaction identifiers issued by Apple App Store / Google Play Store
- Anonymous RevenueCat user IDs needed to verify Premium status
We do not store your credit card or financial information. Payments are processed by Apple or Google.
d. Diagnostics & Usage
- Crash logs (via Firebase Crashlytics)
- Anonymous usage statistics (e.g., features used, session duration)
2How We Use Information
- To provide the service: Syncing your decks and study progress across devices.
- To generate content: Sending words to our AI service (OpenAI via Cloud Functions) to generate translations, synonyms, and examples.
- To improve learning: Calculating efficient review schedules using our Spaced Repetition algorithms.
- To manage accounts: Verifying premium subscriptions and handling support requests.
3Data Storage & Security
- All user data is stored securely in Google Cloud Platform (via Firebase) in the United States.
- Authentication is handled via secure tokens; we never see your password.
- AI generation requests are processed via stateless Cloud Functions.
4Third-Party Services
Firebase (Auth, Firestore, Crashlytics)
Authentication, Database, & Diagnostics
https://policies.google.com/privacyWe use OpenAI's API for generating card content. Data sent to the API is not used to train OpenAI's models.
5Data Deletion
You have full control over your data. You can permanently delete your account and all associated data directly within the app:
Profile Screen → Delete Account
This action is immediate and irreversible. It removes your user profile, all decks, cards, and review history from our servers.
For more details, visit our Data Deletion page.
Profile Screen → Delete Account
This action is immediate and irreversible. It removes your user profile, all decks, cards, and review history from our servers.
For more details, visit our Data Deletion page.
6Children’s Privacy
NeoCards is not directed to children under 13. If we become aware that we have collected personal data from a child under 13 without parental consent, we will delete that information.
7Contact
Questions about your privacy? Email support@matheu.app