Last Updated: 2023.10.10

1. Collection and Use of Personal Information

"Challenge! Sudoku!" app (hereinafter referred to as the "App") does not collect any personal information from users. The App uses Firebase Authentication for managing user IDs; however, it does not collect or store additional personal information for the purpose of personal identification.

2. Firebase Authentication

The App utilizes Firebase Authentication to manage user IDs securely. Firebase Authentication, a service provided by Google, is used solely for user authentication and security purposes. No additional personal information is collected or stored for user identification.

3. Security and Storage

The App securely stores and manages user IDs using Firebase Authentication, benefiting from its robust security measures and data protection protocols.

4. Third-Party Sharing

The App does not share user information with third parties. Firebase Authentication does not share user IDs with the App's developers or operators.

5. User Rights

Users have the right to access, modify, or delete their personal information, although the App does not collect such information. Users can request access or changes to their data by contacting us at [email protected].

6. Contact Information

For any further information or inquiries regarding this Privacy Policy, please contact us at [email protected].

7. Legal Compliance

"Challenge! Sudoku!" app complies with local laws and regulations.