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Privacy Policy
Last updated: June 2025
Data Controller
What data we collect
- Account data: Email address and authentication token via Firebase Auth (Google).
- Study data: Decks, cards, study sessions, and SRS progress stored in Firestore.
- AI usage data: Token consumption and credit balance for billing.
- Analytics: Simple Analytics — privacy-friendly, no personal data, no cookies. simpleanalytics.com
How we use your data
- Firebase Auth for account management and authentication.
- Firestore (Google Cloud, EU region) for storing your study content and progress.
- AI providers (Alibaba Qwen, Google Gemini) for generating flashcards and explanations — prompts are transmitted but NOT stored by these providers beyond the duration of the API call.
- Simple Analytics for anonymous usage statistics.
Data storage and retention
Data is stored in Google Cloud Firestore (EU region). Deleting your account removes all associated data. Study data is retained until you delete your account.
Cookies
This application uses essential session cookies for authentication only. No tracking cookies. No advertising cookies.
Third-party services
- Firebase (Google) — Privacy Policy
- Simple Analytics — Privacy Policy
- Alibaba Qwen API — Privacy Policy
- Google Gemini API — Terms & Privacy
Your rights under GDPR
You have the right to access, rectify, delete, restrict processing of, and portability of your personal data. You also have the right to object to processing.
To exercise these rights, contact emil.krebs@outlook.de.
Changes to this policy
We reserve the right to update this privacy policy. Changes will be posted on this page.
Contact
See also: Imprint