Privacy Policy

App Name: Nghe & Viết (Listen & Write)

Developer: NGUYEN VAN CUONG

Last updated: December 19, 2025

This Privacy Policy applies to the "Nghe & Viết" (Listen & Write) app (hereby referred to as "Application") for mobile devices that was created by NGUYEN VAN CUONG (hereby referred to as "Service Provider") as a Free service. This service is intended for use "AS IS".

1. Information Collection and Use

Permissions Requested

The Application requires certain permissions to function effectively as an educational tool:

• Microphone Access: The app uses the microphone solely to allow parents to record personalized audio lessons for their children. These recordings are stored locally on your device and are never uploaded to any external server.
• Face ID / Touch ID (Biometric Authentication): The app uses the device's native biometric APIs to secure the "Parent Section". The Application does NOT access, collect, or store your actual biometric data (fingerprint or face data). It simply receives a confirmation from the operating system to grant access.

Personal Data

The Application does not knowingly collect or solicit any personally identifiable information from users. Since the app functions entirely offline (locally), no user data is transmitted to the Service Provider.

2. Children’s Privacy

Nghe & Viết is designed for children aged 4-10. We are committed to complying with the Children's Online Privacy Protection Act (COPPA) and related regulations.

• We do not collect personal information from children.
• We do not allow third-party advertising.
• We do not have in-app purchases.
• All content generation is controlled by the parent/guardian via a secured gate.

3. Data Storage and Retention

All data created within the Application (including text lessons, audio recordings, and progress logs) is stored locally on your device's internal storage.

If you uninstall the Application, this data will be permanently deleted from the device. The Service Provider cannot recover this data as we do not maintain a cloud backup.

4. Security

We implement security measures to ensure the safety of the app environment:

• Parental Gate: Critical features (creating content, editing lessons) are protected by biometric authentication to prevent accidental modification by children.
• Local Storage: By keeping data off the internet, we eliminate the risk of remote data breaches.

5. Changes to This Privacy Policy

The Service Provider may update our Privacy Policy from time to time. Thus, you are advised to review this page periodically for any changes. We will notify you of any changes by posting the new Privacy Policy on this page.

6. Contact Us

If you have any questions or suggestions about the Privacy Policy, do not hesitate to contact the Service Provider.