Privacy Policy for NumberSprint – Quick Math Last Updated: June 17, 2026 Calcora Studio ("we," "us," or "our") operates the mobile application NumberSprint – Quick Math (the "App"). We are committed to protecting and respecting your privacy. This Privacy Policy explains how we handle information in connection with your use of the App. By downloading and using the App, you agree to the terms outlined in this policy.

1. Information Collection and Use NumberSprint – Quick Math is designed as a fully offline, self-contained educational game. No Personal Information Collected: We do not collect, request, scrape, or store any personal data (such as your name, email address, physical address, phone number, location, or device identifiers). No Cloud Transmission: Because the App requires no internet permissions, none of your gameplay data, scores, or settings are ever transmitted to external servers, cloud environments, or third parties.
2. Local Storage of Gameplay Data All progression tracking and customization metrics in the App are stored strictly locally on your individual device using Android’s standard SharedPreferences mechanism. This includes: High scores and game records across different game modes (Addition $+$, Subtraction $-$, Multiplication $\times$, and Division $\div$). Cumulative Experience Points (XP) and Brain Trainer Levels. Match history records (last 5 matches). Unlocked achievements and badges. User preferences (such as Light Mode/Dark Mode theme selections and default difficulty tuning). Data Control: You have full ownership and control over this data. You can completely erase all local statistics, high scores, and level progression at any time by navigating to the Performance Analytics screen in the App and selecting "Erase Progress & Matches". Uninstalling the App from your device will also permanently delete this locally stored data.
3. Permissions The App operates under a minimal footprint model: No Permissions Required: The App does not request, access, or require any sensitive Android system permissions (such as access to your Camera, Contacts, Location, Microphone, Storage photos, or Device Accounts).
4. Third-Party Services and Analytics To ensure the highest standard of user privacy: No Third-Party SDKs: The App does not integrate any third-party software development kits (SDKs). No Analytics or Trackers: We do not use third-party analytics tools (such as Firebase Analytics, Google Analytics, or Flurry) to monitor or track your behaviors. No Advertisements: The App does not contain third-party ad networks or SDKs that collect data for behavioral advertising or user profiling.
5. Children's Privacy The App contains quick math challenges suitable for users of all ages, including children. Because the App does not collect, request, or transmit any personal information, it is fully compliant with the Children's Online Privacy Protection Act (COPPA) and general global privacy standards concerning children. We do not knowingly collect personal data from children under the age of 13.
6. Changes to This Privacy Policy We may update our Privacy Policy from time to time. Any changes will be made available by publishing the new Privacy Policy directly within the App stores or on our official distribution channels. You are advised to review this page periodically for any modifications.
7. Contact Us If you have any questions, feedback, or suggestions regarding this Privacy Policy or our privacy practices, please contact us at: Calcora Studio Email: [email protected]