Privacy Policy for English Grammar

1. Introduction

Welcome to English Grammar ("App"), an English grammar learning application published by Miravill. We are committed to protecting your personal information and your right to privacy. This Privacy Policy explains how we collect, use, and share your data when you use our App.

2. Information We Collect

We collect the following types of information:

• Personal Information: If you choose to create an account, we collect your email address to create and authenticate your account.
• App Progress & Study Data: We collect and save your progress on study questions, quiz scores, exam history, bookmarked questions, and app settings so that you can sync your progress across devices.
• Device & Diagnostics: We use Firebase Crashlytics to automatically collect crash reports and performance metrics (such as device model, operating system version, and stack traces) to help us identify and fix bugs. This data does not contain any personally identifiable information.

3. How We Use Your Information

We use the collected information for the following purposes:

• To create and manage your user account.
• To save and sync your learning progress, quiz scores, and settings.
• To diagnose crash reports, fix bugs, and improve overall App stability.

4. How We Share Your Information

We do not sell or rent your personal data. We may share your data only in the following scenarios:

• Firebase Services (Google): We use Firebase Authentication for secure sign-in and Firestore for cloud database storage. This is governed by Google's Privacy Policy.
• Firebase Crashlytics (Google): Used to automatically collect anonymous crash reports.
• Legal Compliance: We may disclose your information if required by law or to protect our legal rights.

5. Data Security

We implement standard security measures to safeguard your information. All data transmitted between the App and our backend servers is encrypted in transit and secured using cryptographic signatures to prevent unauthorized access.

6. Your Data Rights

You have the right to access and modify your study progress in the App. You also have the right to request the deletion of your account and all associated data. You can initiate a deletion request directly within the App's Profile settings or by emailing us at the contact address below.

7. Children's Privacy

English Grammar does not knowingly collect personal data from children under 13. If you have any concerns regarding children's privacy, please contact us immediately.

8. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify users of significant changes by updating the effective date at the top of this page.

9. Contact Us

If you have any questions or concerns about this Privacy Policy, please contact us at:

Email: quanthien84@gmail.com

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