Privacy Policy

Last updated: December 31, 2025

crelve (hereinafter referred to as "we" or "us") establishes this Privacy Policy (hereinafter referred to as "Policy") regarding the handling of personal information of users in the mobile application "JH Society BeStudy" (hereinafter referred to as "App").

1. Information We Collect

We may collect the following information through this App.

1.1 Information You Provide

• Authentication information (user identifier when signing in with Apple ID)
• Learning progress data (quiz accuracy rates, learning history, etc.)

1.2 Automatically Collected Information

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

2. How We Use Information

We use the collected information for the following purposes:

1. Providing and operating the App services
2. Saving and synchronizing learning progress
3. User support
4. App improvement and new feature development
5. Usage analysis
6. Ad delivery and optimization
7. Prevention of unauthorized use

3. Third-Party Services

This App uses 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 analysis	Link
Firebase Crashlytics	Google LLC	Crash reporting	Link
Google AdMob	Google LLC	Ad delivery	Link
RevenueCat	RevenueCat, Inc.	Subscription management	Link

3.1 About Advertising

This App uses Google AdMob to deliver advertisements. AdMob may use advertising identifiers and cookies to deliver personalized ads.

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

4. Information Sharing

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

1. When the user has given consent
2. When required by law
3. When necessary to protect human life, body, or property
4. Sharing with service providers listed in "Third-Party Services" above

5. Data Storage

Collected information is stored for the period necessary to provide services. Learning data is stored on the device and in the cloud (Firebase), and will be deleted when the account is deleted.

6. Data Security

We take industry-standard security measures to protect collected information. However, transmission over the Internet and electronic storage methods are not 100% secure.

7. Your Rights

Users have the following rights:

• Right of Access: You can request access to your personal information we hold
• Right to Rectification: You can request correction of inaccurate personal information
• Right to Erasure: You can request deletion of personal information
• Data Portability: You can request a copy of your personal information

To exercise these rights, please contact us at the address below.

8. Children's Privacy

This App is an educational app designed for junior high school students. If children under 13 use this App, please use it with parental consent.

We do not intentionally collect personal information from children under 13. If we become aware that we have collected personal information from a child under 13, we will promptly delete it.

9. Changes to This Policy

We may change this Policy as necessary. If there are significant changes, we will notify you through the App or other means. The changed Policy takes effect from the time it is posted on this page.

10. App Tracking Transparency

On devices running iOS 14.5 or later, the app will request permission before tracking user activity. Even if you do not allow tracking, you can still use the basic features of this App. Tracking is primarily used for ad personalization.