Privacy Policy

Established: April 29, 2026 / Last Updated: April 29, 2026

This Privacy Policy explains how Hiroshi Oda ("we", "us", or "our") handles user information in the application "Mahjong Fold Dojo" (the "App"). Please read and understand this policy before using the App.

1. Information We Collect

To improve the service, analyze usage, and investigate issues, we may collect the following information. This does not include information that directly identifies individuals (such as name, address, or phone number).

• Usage Data: App launches, screen transitions, and feature usage history
• Device Information: Device model, OS version, language/region settings, IP address, advertising identifiers (IDFA/AAID), etc.
• Diagnostic Data: Crash reports and performance data
• Locally Stored Data: Learning progress, incorrect-answer history, and app settings (time limit and language)

2. Information Collection Modules

To collect and analyze the above information, the App uses the following third-party modules. Information provided to us through these modules does not include personally identifiable information.

• Google Analytics for Firebase / Firebase Crashlytics (Google LLC)

  For details on collected information and usage, please refer to Google's policies below.

  • Google Privacy Policy
  • Google Analytics for Firebase data collection

These collection features are enabled only in release builds of the App.

3. Purposes of Use

We use collected information for the following purposes:

• To improve service quality and App features
• To perform statistical analysis of usage trends
• To investigate and respond to bugs and service issues
• To support future feature development
• To retain progress and settings locally for continued use

4. Provision to Third Parties

Except where required by law or otherwise permitted by applicable law, we do not disclose or provide collected information to third parties without user consent.

5. Deletion of User Data

Data stored locally on your device can be deleted by uninstalling the App or clearing the App's data on your device.

6. Changes to This Policy

We may revise this Privacy Policy due to legal updates or service improvements. If there are significant changes, we will notify users in the App or on our website. The latest version will always be available on this page.

7. Contact

For questions about this Privacy Policy, please contact us at:

hi12801280@gmail.com