Cookie Policy

Cookies and similar storage technologies

Hurra Mathe uses only strictly necessary storage: Local Storage, Session Storage and IndexedDB in the browser, plus the storage used by Firebase authentication. It supports sign-in, security, language, appearance, offline use and learning progress. Hurra Mathe uses no analytics or audience measurement, no tracking and no advertising. As no services requiring consent are used, no cookie banner is needed.

Essential storage

This includes language and light/dark mode, locally cached learning and synchronisation state, Firebase authentication data, and device/session identifiers that protect accounts against parallel use. Depending on their purpose, these values remain for the session or until sign-out, deletion or a settings change. They are based on providing the service you explicitly requested or our legitimate interest in secure, functional operation (Art. 6(1)(b) and (f) GDPR and applicable ePrivacy law). A cookie choice stored by earlier versions is deleted automatically on start.

hCaptcha protects security-sensitive forms against automated attacks. Firebase provides authentication, database and synchronisation. Stripe is used only when a purchase or subscription management is requested. These services are required for security or the requested feature.

Data locations and international transfers

Hurra Mathe’s Cloud Functions and named Firestore database are configured in europe-west3 (Frankfurt). This regional setting does not automatically apply to every Google service: according to Google, Firebase Authentication runs exclusively from US data centres, while Firebase App Check uses global infrastructure. hCaptcha and Stripe may also process data outside the EU/EEA. Where an international transfer occurs, the providers state that suitable safeguards include EU Standard Contractual Clauses and, where applicable, the EU-US Data Privacy Framework. This overview is reviewed regularly.