Effective date: 2025-10-22
Last updated: 2026-01-14

Welcome to DingTou App (“we” or “the site”). This policy explains how we handle information when providing tools and content.

By continuing to access or use the site, you agree to this policy. If you do not agree, please stop using the site.

1. Information We Collect

1.1 Information you provide

  • Contact info: name, nickname, and email provided when you contact us.
  • Communication records: emails related to your inquiries or feedback.

1.2 Information collected automatically

  • Device info: browser type, OS, device type.
  • Access logs: IP address, access time, pages visited, time on page.
  • Cookies/local storage (see Section 3).

We do not require registration or collect portfolio, trades, or account details.

2. How We Use Information

  • Service delivery: provide quotes, backtest calculations, and visualizations.
  • Support: respond to questions, feedback, and essential notices.
  • Improve experience: analyze anonymous usage to enhance features and performance.
  • Security: detect abnormal access and potential abuse.
  • Compliance: meet legal and regulatory obligations.

3. Cookies and Similar Technologies

We use cookies/local storage to save theme preferences for a consistent experience.

3.1 Types of cookies

  • Essential cookies: enable core features like theme settings.
  • Performance/analytics cookies: if enabled, we will clearly disclose.

3.2 How to manage cookies

You can clear or disable cookies in your browser, but preferences may not persist.

4. Sharing and Disclosure

We do not sell, rent, or trade your personal information. We may disclose only in these cases:

  • Service providers: necessary hosting and infrastructure support.
  • Legal requirements: comply with laws, court orders, or regulators.
  • With consent: other situations you explicitly agree to.

5. Third-Party Services

  • Market data: may come from third-party public APIs.
  • External links: third-party sites have their own policies.
  • Analytics (51.LA-V6 and GA4): used for traffic analytics.

6. Data Security

  • HTTPS encryption in transit.
  • Least-privilege access controls.
  • Ongoing review and updates to security measures.

Internet transmission carries inherent risks. We strive to protect your information but cannot guarantee absolute security.

7. Data Retention

We retain information only as long as necessary for the purposes described or as required by law.

8. Your Rights

  • Right to access: know what personal info we hold.
  • Right to correct: fix inaccurate or incomplete info.
  • Right to delete: request deletion where permitted by law.
  • Right to object: object to processing in certain cases.
  • Right to withdraw consent: where processing is based on consent.

To exercise these rights, contact us as described in Section 12.

9. Children’s Privacy

Users under 18 should use the site with a parent or guardian. We do not knowingly collect their personal data.

10. Cross-Border Data Processing

Our infrastructure may be located in or outside China. To provide services, your data may be transferred across borders. Continued use indicates your understanding.

11. Updates to This Policy

  • We will post updates to this page with the latest version and date.
  • We may update this policy at any time. Material changes will be highlighted on the homepage.
  • Continued use means you accept the updated terms.

12. Contact Us

We will respond within three (3) business days.