This Privacy Policy applies to the mobile application "Sudoku Duel Friends" developed and operated by Sejun Studio ("Developer").
The app does not directly request users to manually enter personal information such as name, address, or phone number. However, the app uses third-party services (e.g., Firebase and AdMob) that may automatically collect certain information for functionality, analytics, stability, and advertising.
The app itself does not directly collect personal information through custom forms. However, third-party services integrated in the app may collect information such as:
The app uses the following third-party services:
These services may collect and process data in accordance with their own privacy policies. For more information, please refer to:
Information processed via third-party services may be used to:
We do not sell users’ personal information. Data may be shared with third-party service providers (such as Google) solely for providing the services described above.
Data collected by third-party services is retained according to the policies and settings of those services. The Developer does not control the retention period of data stored and processed by those providers.
The app is not intended for children under the age of 13. We do not knowingly collect personal information from children under 13. If you believe a child has provided personal information, please contact us so we can take appropriate action.
We take reasonable measures to protect information processed by the app and third-party services. However, no method of transmission or storage is 100% secure.
You can stop all data collection by uninstalling the app. You may also reset your device advertising ID through your device settings (availability depends on your device/OS).
Users may request deletion of their account and associated data at any time. Account and data deletion requests can be made outside the app.
To request deletion, please contact us at:
Email: fourleaves2@naver.com
Upon receiving a valid request, we will delete the user’s authentication data (if applicable) and associated game data stored on our servers within a reasonable timeframe, unless retention is required by law.
If you have any questions about this Privacy Policy or account deletion, please contact:
Email: fourleaves2@naver.com
We may update this Privacy Policy from time to time. When we update it, we will revise the effective date below.
Effective Date: November 13, 2025