1. Introduction

The developer of MJScore (hereinafter "the Application" or "our Application") (hereinafter "we") respects the privacy of our users and is committed to protecting personal information. This Privacy Policy explains how we handle personal information when you use our Application.

By using our Application, you are deemed to have agreed to this Privacy Policy.

2. Types of Information We Collect

2.1 Information Provided by Users

Our Application collects the following information:

• Player Information: Player names (mahjong player names) entered by users
• Game Data: Scores, venue locations, dates and times, participant information
• Statistical Data: Number of games, performance records, ranking history and other statistical information
• Application Settings: Starting point settings, rule settings and other usage environment settings

2.2 Automatically Collected Information

• Usage Data: Application launch count, usage time, feature usage frequency
• Error Information: Application crash reports, error logs (only when using LogRocket)
• Device Information: OS version, device model, screen resolution and other technical information

3. Information Storage and Management

3.1 Local Storage

All data input and generated in our Application is stored locally on the user's device. Data is not automatically sent to external servers or cloud services.

3.2 Data Management

• All data is under the complete control of users
• Users can freely delete, edit, and export data
• Uninstalling the Application will delete all data

4. Purpose of Information Use

The collected information is used solely for the following purposes:

• Providing Core Functions: Calculating, recording, and displaying mahjong score statistics
• Improving User Experience: Providing statistical information based on past data
• Application Improvement: Feature improvement and bug fixes through usage analysis
• Technical Support: Error resolution and application stability improvement

5. Information Sharing and Third-Party Provision

5.1 Third-Party Provision

We do not provide users' personal information to third parties except in the following cases:

• When users give explicit consent
• When disclosure is required by law
• When necessary for maintaining public safety and order

5.2 User-Initiated Information Sharing

When using our Application's sharing features to share game results, information is shared with third parties based on user intent. In such cases, please verify in advance the scope of information to be shared and the recipients.

6. Use of Third-Party Services

6.1 LogRocket (Production Environment Only)

We may use LogRocket in production environments to improve application quality:

• Collected Data: User operation logs, error information, performance data
• Purpose: Bug identification, user experience improvement
• Privacy Policy: LogRocket Privacy Policy

6.2 App Stores

Our Application is distributed through the App Store or Google Play Store. The terms of service and privacy policies of these platforms also apply.

7. Data Protection and Security

• Encryption: Use appropriate encryption when storing data on devices
• Access Control: Restrict data access from outside the Application
• Regular Updates: Fix security vulnerabilities

However, we cannot guarantee 100% security in digital environments.

8. User Rights

8.1 Data Management Rights

• Right to Delete: Complete data deletion through in-app functions or uninstallation
• Right to Edit: Modify and update stored data
• Right to Export: Share and save results in image format
• Right to Access: Access to all stored data

8.2 Settings Management

Users can freely change the following settings:

• Whether to use data analysis functions
• Statistical information display settings
• Application operation settings

9. Protection of Minors

Our Application does not intentionally collect personal information from children under 13 years of age. If children under 13 use our Application, they should do so with parental consent and supervision. If we become aware that we have collected personal information from children under 13, we will promptly delete it.

10. International Data Transfer

Since our Application data is primarily stored on users' devices, international data transfer does not occur. However, when using third-party services such as LogRocket, data is processed according to those services' terms of use.

11. Changes to Privacy Policy

This Privacy Policy may be changed due to legal changes or service improvements. In case of significant changes, we will notify you through the following methods:

• In-app notifications
• Announcements on our official website
• Update information in app stores

Continued use of the Application is deemed as agreement to the revised Privacy Policy.

12. Applicable Law and Jurisdiction

This Privacy Policy is governed by and interpreted according to Japanese law.

13. Contact Us

If you have questions, opinions, or privacy concerns regarding this Privacy Policy, please contact us through the following methods:

• In-app feedback feature
• Supported Languages: Japanese and English
• Response Time: Within one week

We will respond to your inquiries with due consideration for privacy protection.