Last Updated: October 6, 2025

ZhiLing ("we," "us," or "our") is committed to protecting your privacy. This Privacy Policy explains our approach to privacy and data handling when you use our ZhiLing mobile application ("App"). ZhiLing is designed to run entirely on your device and does not collect, transmit, or store any personal information on external servers. Please read this policy carefully.

1. Information We Do Not Collect

ZhiLing is designed with privacy in mind and operates entirely on your local device. We do not collect, transmit, or store any of your personal information on external servers. Specifically:

• No Personal Data Collection: We do not collect or transmit any personal information about you or your child.
• No Assessment Data Transmission: All assessment data, including child information, test results, and developmental calculations, remains stored locally on your device only.
• No Usage Tracking: We do not track how you use the app or collect analytics data.
• No Device Information: We do not collect device identifiers, location data, or other device-specific information.
• No Network Communication: The app functions completely offline and does not communicate with external servers.

2. How Your Data Stays Private

Since ZhiLing operates entirely on your device:

• Local Processing Only: All developmental assessments based on the WS/T580-2017 standard are processed locally on your device.
• Local Storage Only: Child information, assessment results, developmental age (MA), and developmental quotient (DQ) calculations are stored only on your device.
• No External Dependencies: The app does not require internet connectivity to function and does not send data to external services.
• Complete User Control: You have full control over all data as it never leaves your device.

3. Data Sharing

Since we do not collect any data:

• No Data Sharing: We cannot share your information because we do not have access to it.
• No Third-Party Services: We do not use any third-party services that could access your data.
• No Legal Disclosure: Since we do not collect or store your data on our servers, we cannot be compelled to disclose information we do not possess.

4. Data Storage and Security

Your data security is ensured through our local-only approach:

• Local Storage Only: All data is stored exclusively on your device using iOS's secure storage mechanisms.
• No Cloud Backup by Us: We do not provide or manage any cloud backup services.
• Device Security: Your data is protected by your device's built-in security features, including device encryption and access controls.
• User-Controlled Backup: If you choose to back up your device using iCloud or other services, that is entirely under your control and governed by those services' privacy policies.

5. Your Control

Since all data remains on your device, you have complete control:

• Full Data Control: You can view, edit, or delete all information at any time through the App.
• Data Export: You can export your assessment data for backup or sharing with healthcare professionals.
• No Communications: We do not and cannot send you any communications since we do not collect contact information.
• Uninstall: Simply deleting the app removes all associated data from your device.

6. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices or for legal reasons. Since we do not collect contact information, we will notify you of significant changes through app updates. Your continued use of the App after such changes constitutes your acceptance of the updated policy.

7. Contact Us

If you have any questions or concerns about this Privacy Policy, please contact us at:

Email: [email protected]

Thank you for trusting ZhiLing with your information.