Information we collect

• Account data: your username, email address, avatar, full name, date of birth, and country (when you sign up or update your profile).
• Learning data: progress, completed units/tests, streaks, XP, goals, and app settings.
• Device/storage data: local app preferences and cached progress stored in your browser or PWA storage.
• Diagnostics: basic error logs used to troubleshoot issues (stored locally unless you share them).

How we use your information

• To create and secure your account.
• To sync your learning progress across devices.
• To show your rank on the leaderboard when enabled.
• To improve app reliability and fix bugs.

Sharing & third‑party services

Full Calculus uses Google Firebase for authentication, data storage, and hosting. If you sign in with Google, your account is handled by Google’s authentication services. Firebase may process your data to provide these features.

Leaderboard visibility

The leaderboard shows a public profile with your username, avatar, XP, and streak. This information is visible to other signed‑in users.

Your choices

• You can update your username and avatar from Settings.
• You can log out to clear local app data on the device.
• You can request account deletion by contacting support.

Data security

We use industry‑standard services (Firebase) to store and protect your data. No method of transmission or storage is 100% secure, so we cannot guarantee absolute security.

Contact

For questions or requests, contact: sentira.official@gmail.com