1. Introduction

This Privacy Policy explains how CalcSphere Studio ("we", "us", or "our") handles information in connection with the mobile application CalcSphere Pro (package name: com.calcsphere.pro).

Your privacy is our utmost priority. CalcSphere Pro is engineered from the ground up as a private, standalone mathematical, financial, scientific, and unit converter suite.

2. Information Collection and Use

We collect zero personal data.

• No Personal Identifiable Information (PII): We do not ask for, collect, or store your name, email address, phone number, physical address, or any other personally identifying information.
• No Account Required: You do not need to register, log in, or provide any credentials to use any feature of CalcSphere Pro.
• No Location Data: We do not track, collect, or access your GPS or network-based location.
• No Media / File Access: The app does not access your photos, camera, microphone, contacts, or personal files.

3. Calculation Data and Local Storage

All calculations, equations, conversions, and results are processed exclusively on your device in real-time.

• Calculation History: Any calculation tape or calculation history is stored locally on your device using sandboxed local app storage. You can erase this history at any time using the "Clear History" button inside the Settings screen.
• App Preferences: Selected theme (Classic Dark, OLED Black, Midnight Navy, etc.) and selected language are saved locally on your device solely to preserve your preferred user experience.
• No Cloud Sync / No Servers: None of your calculation inputs, history, or settings are ever uploaded to external servers or cloud services.

4. Third-Party Services & Analytics

CalcSphere Pro operates offline and does not integrate third-party tracking, analytics, or behavioral advertising SDKs.

• No Google Analytics / Firebase Analytics tracking.
• No third-party ad networks or user profiling.
• No data sharing with brokers or third parties.

5. Device Permissions

CalcSphere Pro requires only standard, non-sensitive runtime requirements to function properly:

• Internet Access (Network State): Used solely for standard web component initialization (if applicable). No user data is transmitted over the network.
• Vibration / Haptics: Standard system haptic feedback API for tactile key feedback (if enabled by the user).

6. Children's Privacy

Our application is safe for users of all ages, including children. We do not knowingly collect any personally identifiable information from children under the age of 13. Since no personal data is collected from any user, CalcSphere Pro is fully compliant with the Children's Online Privacy Protection Act (COPPA) and the Google Play Families Policy.

7. Security of Your Data

Because all your inputs and calculations remain exclusively within the local sandbox on your physical device, your data is as secure as your device itself. Uninstalling the app completely removes all locally stored app preferences and calculation history.

8. Changes to This Privacy Policy

We may update our Privacy Policy from time to time. Any changes will be reflected on this page with an updated "Last updated" date. We encourage you to review this Privacy Policy periodically for any changes.

9. Contact Us

If you have any questions, suggestions, or concerns regarding this Privacy Policy or CalcSphere Pro, please contact us: