Privacy Policy

Effective Date: May 2026 · Developed by Adeleke Olasope under Empyreal Works

🎮 Calculator Rush is designed for safe and educational play. It does not contain ads or third-party tracking.

🔒 No account required. The app works fully offline. All your progress (XP, achievements, settings) is stored locally on your device.

☁️ Optional cloud sync allows you to back up your progress using Google Sign-In via Firebase.

🚫 No selling of data. We do not sell or share your personal information with advertisers.

1. Who We Are

Calculator Rush is developed and maintained by Adeleke Olasope, trading as Empyreal Works. For privacy-related questions, contact us at hello@empyrealworks.com.

2. How the App Works — Two Modes

Guest mode (no account)

All features are available without creating an account. In guest mode:

All math progress, XP, levels, and achievements are stored locally on your device.
No data is transmitted to any server.
No account, email address, or personal identifier is collected.

Signed-in mode (optional)

If you choose to sign in via Google, the following features become available:

Cloud backup of your progress (XP, Level, Achievements, Stats).
Syncing your progress across multiple devices.

You can delete your account and all associated cloud data at any time from within the app settings.

3. Information We Process

Data that remains on your device

Calculation history and button usage statistics.
App preferences and theme selections.
Onboarding and tutorial progress.

Data processed when signed in

Account credentials

Handled entirely by Firebase Authentication (Google). We do not store passwords. We only receive your name, email, and profile picture from Google to personalize your experience.

Game Progress Firestore

When signed in, the following progress data is synced to your private Firestore document:

Current Level and XP.
Unlocked Achievements.
Button Evolution stages.
Game statistics (total games, accuracy, etc.).

4. Device Permissions

Permission	Purpose
Vibration / Haptics	Used to provide tactile feedback during button presses and game events.
Internet	Required only for cloud sync and viewing external links. Not used in guest mode.

5. Third-Party Services

When you use cloud features, the following Google services are involved:

Service	Purpose
Firebase Authentication	Manages sign-in credentials. Privacy policy
Cloud Firestore	Stores game progress in your private user document.

No analytics platforms, advertising SDKs, or other tracking tools are used.

6. Data Retention & Deletion

Local progress remains on your device until you clear app data or uninstall the app.
Cloud data is retained until you delete it from the app or delete your account.
To delete your account and all associated data, go to the in-app settings and follow the account deletion process.

7. Security

All network communication uses HTTPS/TLS.
Data in Cloud Firestore is protected by rules ensuring only you can access your own data.

8. Children's Privacy

Calculator Rush is built for all ages and emphasizes safety. In guest mode, we collect no personal data. We encourage parents to supervise their children's use of any app with cloud features.

9. Changes to This Policy

If we update this policy, the revision date will be updated. Significant changes may be announced within the app.

10. Contact

Adeleke Olasope / Empyreal Works
hello@empyrealworks.com

Sparking joy and learning through math! 🚀