Privacy Policy

1. Information We Collect

Account Information

When you register for an account, we collect:

• Email address
• Password (stored in hashed form; we never store your plain-text password)

Learning Data

When you use the Service, we automatically collect:

• Topics you have viewed
• Quiz attempts and scores
• Learning progress and history

Analytics Data

We use Firebase Analytics (provided by Google) to understand how users interact with the Service. Firebase Analytics may collect:

• Pages visited and time spent
• Device type, browser, and operating system
• General geographic location (country/region level)
• Cookies and device identifiers

For more information, see Google's Privacy Policy.

Error Tracking Data

We use Sentry to monitor and fix technical errors. Sentry may collect:

• Error messages and stack traces
• Browser and device information
• The page URL where an error occurred

Sentry does not collect your name or email address in error reports. For more information, see Sentry's Privacy Policy.

2. How We Use Your Information

We use the information we collect to:

• Create and manage your account
• Save and display your learning progress and quiz scores
• Improve and fix issues with the Service
• Analyze usage patterns to improve the user experience

3. Cookies and Tracking Technologies

We do not use advertising cookies. However, Firebase Analytics uses cookies and similar tracking technologies (such as device identifiers) to collect usage data. By using the Service, you consent to the use of these cookies.

You can control cookies through your browser settings. Disabling cookies may affect some features of the Service.

4. Data Storage and Security

Your data is stored on servers located in the United States, provided by IONOS. We take reasonable technical and organizational measures to protect your personal information. However, no method of transmission over the internet is 100% secure.

5. Data Retention

We retain your personal data for as long as your account is active. If you request account deletion, we will delete your personal data within 30 days, except where we are required to retain it by law.

6. Children Under 13 (COPPA)

Registration on the Service is restricted to users 13 years of age or older. During registration, you must confirm that you are at least 13 years old.

We do not knowingly collect personal information from children under 13. If we become aware that a user under 13 has created an account, we will delete the account and associated data promptly.

If you believe a child under 13 has registered an account, please contact us at [email protected].

7. Your Rights

For all users

You have the right to:

• Access the personal data we hold about you
• Correct inaccurate personal data
• Delete your account and personal data (see below)

For EU/EEA and UK users (GDPR)

In addition to the above, you have the right to:

• Data portability — receive a copy of your data in a structured, machine-readable format
• Restrict processing of your personal data
• Object to processing based on legitimate interests
• Lodge a complaint with your local data protection authority

The legal bases we rely on for processing your data are: performance of a contract (providing the Service) and legitimate interests (improving the Service and detecting abuse).

For California residents (CCPA)

You have the right to:

• Know what personal information we collect, use, and share
• Request deletion of your personal information
• We do not sell your personal information to third parties

How to exercise your rights

To access, correct, or delete your data, email us at [email protected]. We will respond within 30 days.

Account deletion: We do not have a self-service account deletion feature yet. To delete your account, email [email protected] with the subject "Delete My Account". We will delete your account and personal data within 30 days.

8. Third-Party Services

We use the following third-party services that may process your data:

We do not share your personal information with any other third parties, and we do not use any advertising networks.

9. Changes to This Policy

We may update this Privacy Policy from time to time. We will post the updated policy on this page with a new "Last updated" date. We encourage you to review this policy periodically.

10. Contact Us

If you have any questions about this Privacy Policy or how we handle your data, please contact us:

• Email: [email protected]
• Website: mastergrammar.org / nguphap.com