Privacy Policy

1. Introduction

YICHAIN INTERNATIONAL CO., LIMITED ("Yichain", "we", "us", or "our") respects your privacy and is committed to protecting personal information. This Privacy Policy applies to:

• Our public website and related online pages;
• Mobile applications published by YICHAIN INTERNATIONAL CO., LIMITED on Google Play and other distribution platforms;
• Customer support and privacy request channels operated by us.

By using our website or applications, you acknowledge the practices described in this Privacy Policy. If you do not agree with this Policy, please discontinue use of the relevant services.

If a specific application collects data differently from this Policy, that application will provide an in-app notice or supplemental disclosure. In case of conflict, the disclosure that is more specific to the product will control for that product, while this Policy remains the general baseline.

2. Information We Collect

We collect information in the following categories, depending on how you interact with our services.

2.1 Information you provide directly

• Name, email address, and message content when you contact us;
• Account registration details if an application requires sign-in (for example, email address, display name, or password credentials);
• Support correspondence and attachments you choose to send;
• Preferences you set within an application, where available.

2.2 Information collected automatically

• Device information such as device model, operating system version, language settings, and app version;
• Diagnostics and performance data such as crash logs, stability events, and approximate performance metrics;
• Usage data such as feature interaction events, session timestamps, and in-app navigation paths;
• IP address and approximate network information used for security, fraud prevention, and service delivery;
• Advertising identifiers (such as Google Advertising ID) only where an application uses advertising or measurement features and where permitted by platform rules and user controls.

2.3 Information from third-party services

If an application integrates third-party services (for example analytics, crash reporting, cloud hosting, authentication, payments, or advertising), those services may provide us with limited technical or account-related information needed to operate the product. We require such providers to process data according to their terms and applicable law.

2.4 Information we do not intentionally collect

We do not intentionally collect sensitive personal information such as government ID numbers, precise health records, or precise real-time location unless a specific product clearly discloses that collection and obtains any required consent. Our public corporate website contact form is intended for business and support communication only.

3. How We Use Information

We use collected information to:

• Provide, maintain, and improve our website and applications;
• Respond to support requests and service inquiries;
• Monitor reliability, diagnose errors, and prevent abuse or fraud;
• Personalize in-app experiences where a product offers such features;
• Measure aggregated product performance and feature usage;
• Comply with legal obligations and enforce our Terms of Service;
• Communicate service-related notices, policy updates, or security alerts;
• Support advertising or monetization features only in applications that explicitly include those features.

4. Legal Bases for Processing

Where required by applicable law, we process personal information on one or more of the following bases:

• Performance of a contract or steps requested before entering a contract;
• Legitimate interests in operating secure and reliable services;
• Consent, where consent is required for a specific processing activity;
• Compliance with legal obligations.

5. Sharing of Information

We do not sell personal information. We may share information only in the following circumstances:

• Service providers: hosting, analytics, crash reporting, customer support tooling, email delivery, payment processors, and similar vendors that process data on our instructions;
• Platform partners: Google Play and related Google services as needed to distribute and operate Android applications;
• Advertising partners: only for applications that include ads or measurement, and subject to platform and partner requirements;
• Legal and safety disclosures: when required by law, regulation, legal process, or to protect the rights, safety, and security of users or our company;
• Business transfers: in connection with a merger, acquisition, financing, or sale of assets, subject to appropriate confidentiality protections.

6. Third-Party SDKs and Services

Applications published by us may use third-party software development kits (SDKs) or services. Depending on the product, these may include categories such as:

• Analytics and product usage measurement;
• Crash and performance monitoring;
• Cloud infrastructure and content delivery;
• Authentication or social login providers;
• Advertising and attribution services;
• Payment and subscription processors.

Each published application’s Google Play Data safety section should reflect the actual SDK behavior for that application. If you enable or disable platform privacy controls (for example, advertising ID reset or permission denial), certain features may become limited.

7. Cookies and Similar Technologies

Our website may use essential cookies or local storage required for basic functionality, security, and preference retention. We do not use the corporate website as an advertising tracking property. Browser settings may allow you to block cookies; doing so can affect some site features.

8. Data Retention

We retain personal information only for as long as needed to fulfill the purposes described in this Policy, including:

• Account and profile data: retained while the account remains active and for a reasonable period afterward for security and dispute handling;
• Support communications: retained as needed to resolve issues and maintain service quality records;
• Logs and diagnostics: retained for shorter operational periods unless needed for security investigations;
• Legal records: retained for the period required by applicable law.

When information is no longer required, we delete it or anonymize it so it can no longer reasonably identify you.

9. Data Security

We implement reasonable administrative, technical, and organizational measures designed to protect personal information against unauthorized access, loss, misuse, or alteration. No method of transmission or storage is completely secure. If we become aware of a security incident that affects your personal information, we will take appropriate steps consistent with applicable law.

10. International Data Transfers

YICHAIN INTERNATIONAL CO., LIMITED is based in Hong Kong. Information may be processed in Hong Kong or in other countries where our service providers operate. Where required, we take appropriate steps to protect information transferred across borders.

11. Children’s Privacy

Our website and general business services are directed to adults and business users. We do not knowingly collect personal information from children under 13 years of age (or the minimum age required in your jurisdiction) through our corporate website.

If a specific application is designed for children or mixed audiences, that application will follow additional platform requirements, including Google Play Families policies where applicable. If you believe a child has provided personal information to us inappropriately, contact wang@yichaininternationalco.site and we will take appropriate action.

12. Your Rights and Choices

Subject to applicable law, you may have the right to:

• Request access to personal information we hold about you;
• Request correction of inaccurate information;
• Request deletion of personal information;
• Object to or restrict certain processing;
• Withdraw consent where processing is based on consent;
• Lodge a complaint with a supervisory authority where available.

You may also use device settings to manage permissions, notifications, and advertising identifiers. For account or data deletion requests, see our Data Deletion page or email wang@yichaininternationalco.site.

13. Do Not Track

Some browsers offer a “Do Not Track” signal. Because there is no consistent industry standard for responding to such signals, our website does not currently respond to Do Not Track requests in a differentiated manner.

14. Third-Party Links

Our website or applications may contain links to third-party websites or services. We are not responsible for the privacy practices of those third parties. We encourage you to review their privacy policies before providing personal information.

15. Changes to This Privacy Policy

We may update this Privacy Policy from time to time to reflect changes in our practices, products, or legal requirements. The “Last Updated” date at the top of this page will be revised when changes are published. Material changes will be posted on this page and, where appropriate, communicated through the relevant application or website notice.

16. Contact Us

If you have questions about this Privacy Policy or wish to exercise privacy rights, contact:

Related pages: Terms of Service · App Permissions · Data Deletion · Compliance