Privacy Policy

This Privacy Policy describes how zhko ("we", "our", or "us") collects, uses, and protects your information when you use our website and services at https://zhko.app. By using the Service, you agree to the collection and use of your information in accordance with this policy.

1. Information We Collect

a. Access Logs & Analytics

• Your IP address
• Pages visited and time spent on each
• Browser type and operating system
• Timestamp of each request

This data is used solely for performance monitoring, diagnostics, and protecting our services from abuse (e.g. DDoS detection). We do not use this data for advertising or behavioral profiling.

b. Account Information

• Your email address
• Your username
• A securely hashed version of your login credentials (if applicable)
• Your vocabulary lists, review activity, settings, and learning progress

We store your login credentials securely using industry-standard hashing methods. Your passwords are never stored in plain text.

2. How We Use Your Information

• Provide core learning functionality (e.g. flashcards, review tracking)
• Maintain account access and personalization
• Monitor site reliability and performance
• Detect and prevent abuse or security threats
• Improve features through aggregate usage analysis

We do not use your data for advertising, nor do we sell or rent your information to third parties.

3. Cookies

• To keep you logged in between sessions
• To store your language or interface preferences

No third-party tracking cookies or ad pixels are used. You can disable cookies via your browser settings, though some features may stop working.

4. Data You Submit

We do not store or retain any text or files that you submit for dictionary lookup or sentence generation. All processing is done in real-time, and the input is discarded immediately after use.

5. Sharing and Disclosure

We do not share your personal data with third parties, except:

• When required by law (e.g. valid legal request)
• To ensure the security of the platform (e.g. during abuse investigation)
• In the unlikely event of a business acquisition or transfer, with notice provided

We do not use analytics vendors (like Google Analytics or Facebook Pixel), and we do not integrate with third-party ad networks.

6. Data Retention

We retain your account data (e.g. username, vocab, review history) for as long as your account remains active. If you delete your account, this data will be removed from our systems within a reasonable period (usually <30 days).
Access logs are retained for a limited time for security auditing and diagnostics.

7. Your Rights & Choices

• Access or update your account information
• Request deletion of your account and associated data
• Withdraw consent at any time by ceasing to use the service

To request account deletion, contact us at zhkodotapp@gmail.com or use the in-app settings if available.

8. Security

We take security seriously. User data is encrypted in transit (HTTPS), and sensitive information (like login credentials) is stored in hashed form using industry-standard practices.

However, no method of transmission over the internet is 100% secure. We encourage you to use strong passwords and keep your account credentials private.

9. Children's Privacy

zhko is not intended for users under the age of 13. We do not knowingly collect personal information from children. If you are a parent or guardian and believe your child has provided us with personal data, please contact us and we will delete the data promptly.

10. Changes to This Policy

We may update this Privacy Policy from time to time. If we make significant changes, we'll post a notice on the site or send an email to registered users. The "Last Updated" date at the top reflects the latest revision.

11. Contact Us

If you have any questions or concerns about this Privacy Policy, you can contact us at: zhkodotapp@gmail.com