Last updated: April 27, 2026
This Privacy Notice, issued by Pavel Evtushenko ("we", "us", or "our"), explains how and why we access, collect, store, use, and/or share ("process") your personal information when you interact with our services ("Services"), including when you:
If you have questions or concerns, reading this Privacy Notice will help you understand your privacy rights and options. We are responsible for deciding how your personal information is handled (we are the "controller" under the UK GDPR and EU GDPR). If you do not agree with our practices, please do not use our Services. For any questions, you can contact us at pashaevtushenko@gmail.com.
What personal information do we process? When you use the App, we process: (a) account identifiers from Apple or Google (your provider user ID, email, display name where provided), (b) your private study progress (per-card spaced-repetition state) which is stored in your own user document and is not visible to other users, (c) purchase / subscription state from Apple via RevenueCat, and (d) standard mobile-app diagnostic data (device model, OS version, IP, crash logs, anonymous usage events).
Do we process any sensitive personal information? No. We do not process special-category data such as racial or ethnic origins, sexual orientation, religious beliefs, biometrics, or precise geolocation.
Do we collect any information from third parties? We receive limited account-profile data (user ID, email, display name) from Apple and Google when you choose to sign in with one of those providers, and subscription / receipt status from RevenueCat (which validates your Apple receipt on our behalf). We do not buy data from data brokers.
How do we process your information? To create and run your account, sync your study progress across your devices, manage your subscription entitlement, diagnose crashes, improve the App, and comply with law.
With whom do we share personal information? With our processors: Google (Firebase), Apple, and RevenueCat. We do not sell your personal information and we do not share it for cross-context behavioural advertising.
How do we keep your information safe? Apple device authentication, OAuth via Apple/Google (no passwords stored by us), encrypted transport (TLS), encryption at rest by Firebase, App Check / App Attest to limit backend access to genuine instances of the App, and strict per-user Firestore security rules.
What are your rights? Depending on your location, you have rights to access, correct, delete, port, or restrict processing of your data, to object, and to withdraw consent. You can exercise the most common of these in-app via Settings → Delete Account, or by emailing pashaevtushenko@gmail.com.