Privacy Policy

Last Updated: February 12, 2026

Note: This policy applies to Bắt đầu học tiếng trung version 6.0 and above. For older versions (v5.0 and below), all learning data remains stored locally on your device and no third-party services are used.

1. Introduction

Welcome to Bắt đầu học tiếng trung (App ID: com.easychinese) app. We are committed to protecting user privacy. This policy explains how we handle your information in our latest version.

2. Information Collection and Use

Cloud Sync Data (Version 6.0+)

To provide cross-device synchronization and data backup, we collect your learning progress, scores, and app settings. This data is securely stored on our servers and is only used to restore your progress when you log in on a new device.

We use Google Sign-In to facilitate secure authentication. When you sign in, we collect your basic profile information (Name, Email, and Profile Picture) solely for the purpose of identifying your account and synchronizing your learning progress across devices. We do not share this information with any third parties for marketing purposes.

Locally Stored Data

For all users, the following information is stored on your device:

App settings (e.g., sound settings, interface preferences)
Cached learning content

Device Identifiers

We collect device identifiers (such as Android Advertising ID) to provide personalized advertisements. You can reset or disable this identifier in your device’s system settings (e.g., Settings > Google > Ads).

Third-Party Services

To support our services and provide a better experience, we use the following third-party providers:

Google AdMob: Used to serve advertisements. AdMob uses device identifiers (like Android Advertising ID) to serve personalized ads based on user interests. Users can opt-out of personalized ads in their device settings.
Supabase: Used for secure storage and synchronization of your cloud learning records. You can view their privacy policy at https://supabase.com/privacy.

For more information on Google services, please visit Google’s Privacy & Terms.

Google Play Store

When downloading the app from Google Play Store, the process is handled by Google Play. We do not have access to your payment or store-related personal information.

3. Device Permissions

Our application requests the following permissions:

Device Storage: To cache learning content and store local progress.
Audio: To play Chinese pronunciation and listening exercises.
Internet: To download content, sync cloud data (v6.0+), and display advertisements.

4. Security

We implement security measures to protect your data:

Encryption: All data transmitted between your device and our cloud servers is encrypted using HTTPS/TLS protocols.
Local Protection: Data stored on your device is protected by standard OS security features.

5. User Rights

You have control over your data:

Delete Account: You have the right to delete your cloud account at any time. You can submit a request via [Settings] -> [Delete Account] within the app. Once completed, we will permanently delete all your learning data and personal information from our cloud servers.
Delete Data: You can delete app data at any time through device settings
Permission Control: You can enable/disable access permissions in device settings

6. Children’s Policy

Our application is suitable for all ages and does not collect personal information from children under 13.

7. Policy Updates

We may update this policy over time. Any changes will be notified through the app and website.

8. Contact Us

If you have any questions about our privacy policy, please contact us:

Email: a31840@protonmail.com
Website: hoctiengtrung.eu.org

9. Legal Compliance

Our application strictly adheres to the following regulations and laws:

Google Play Developer Program Policies
Google Play Privacy Requirements
Vietnam Cybersecurity Law
General Data Protection Regulation (GDPR)
Children’s Online Privacy Protection Act (COPPA)

As an application that does not collect personal data, we ensure:

Transparency in data handling
User control over their data
Protection of children’s privacy