Privacy Policy

Last updated: December 31, 2025

crelve ("we", "us", or "our") operates the mobile application "BeStudy JH Science" (the "App"). This Privacy Policy explains how we collect, use, and protect your personal information when you use our App.

1. Information We Collect

We may collect the following types of information:

1.1 Information You Provide

• Learning progress data (quiz answers, scores, study history)
• App preference settings

1.2 Automatically Collected Information

• Device information (device type, OS version, unique identifiers)
• Usage data (app usage frequency, feature usage)
• Crash logs and error reports
• Advertising identifiers (for ad personalization)

2. How We Use Your Information

We use the collected information for the following purposes:

1. To provide and operate the App services
2. To save and restore your learning progress
3. To provide customer support
4. To improve the App and develop new features
5. To analyze usage patterns and enhance user experience
6. To display advertisements
7. To manage subscription services
8. To prevent fraudulent use

3. Third-Party Services

We use the following third-party services. These services collect and use information according to their respective privacy policies.

Service	Provider	Purpose	Privacy Policy
Firebase Analytics	Google LLC	Usage analytics	Link
Firebase Crashlytics	Google LLC	Crash reporting	Link
Google AdMob	Google LLC	Advertising	Link
RevenueCat	RevenueCat, Inc.	Subscription management	Link

3.1 About Advertising

We use Google AdMob to display advertisements. AdMob may use advertising identifiers and cookies to deliver personalized ads.

To opt out of personalized ads, enable "Limit Ad Tracking" or "Opt out of Ads Personalization" in your device settings.

4. Information Sharing

We do not share your personal information with third parties except in the following cases:

1. With your consent
2. When required by law
3. When necessary to protect life, body, or property
4. With service providers listed in "Third-Party Services" above

5. Data Retention

We retain collected information for as long as necessary to provide our services or until you delete your account. Learning progress data is stored locally on your device. After account deletion, personally identifiable information will be deleted within a reasonable period.

6. Data Security

We implement industry-standard security measures to protect collected information. However, no method of transmission over the Internet or electronic storage is 100% secure.

7. Your Rights

You have the following rights:

• Access: Request access to your personal information we hold
• Correction: Request correction of inaccurate personal information
• Deletion: Request deletion of your personal information
• Data Portability: Request a copy of your personal information

To exercise these rights, please contact us using the information below.

8. Children's Privacy

This App is designed for junior high school students (ages 12-15) and their educational use. We do not knowingly collect personal information beyond what is necessary for educational purposes. Parents or guardians may contact us to request access to, correction, or deletion of their child's information.

9. Changes to This Policy

We may update this Privacy Policy as needed. We will notify you of significant changes through the App or other means. The updated Privacy Policy will take effect when posted on this page.

10. App Tracking Transparency

On devices running iOS 14.5 or later, we will ask for permission before tracking your activity. This is primarily used for personalized advertising. You can still use the basic features of the App even if you do not allow tracking.