Privacy Policy

Boyoyon Sim. (the “App”) values the protection of your privacy.
This Privacy Policy describes how personal information is handled in connection with your use of the App.

1. Information we collect
   The App may collect the following information.

   (1) Information collected by third parties for advertising
     - Device information (e.g., OS version, device model)
     - Advertising identifiers (e.g., IDFA on iOS, Android Advertising ID)
     - IP address and approximate location (region inferred)
     - Ad-related usage (e.g., ad impressions and clicks)
     - Identifiers generated by cookies/similar technologies (depending on the environment)

   (2) Information we may receive (to the extent necessary for operations)
     - Information you send when contacting us (e.g., your X account name and message)
     - Log information for troubleshooting (e.g., time of occurrence, error details, brief operation context), to the extent implemented by the App

   Note: The App does not provide a feature that asks you to enter personally identifiable information such as your name or address. However, information you voluntarily disclose/post/send on X is outside the App’s control.

2. Purpose of use
   We use collected information for the following purposes:
     - Ad delivery, measurement, and optimization
     - Providing, maintaining, and improving the App and responding to issues
     - Responding to inquiries
     - Preventing fraud/abuse and ensuring security

3. External transmission / third-party services (Advertising)
   The App uses Google AdMob (Google Mobile Ads) for advertising. Information may be collected and used by AdMob. For details, please refer to:
     - Google Privacy Policy: https://policies.google.com/privacy
     - Google AdMob: https://support.google.com/admob/answer/6128543

4. Security
   We take reasonable measures to prevent leakage, loss, or damage of collected information. However, we do not guarantee complete security.

5. Changes to this Privacy Policy
   This policy may be revised due to changes in laws or operations. If there are material changes, we will notify you in the App or by other reasonable means.

6. Contact
   For questions, please contact us via X DM: @shusukehashimot
   Please note that depending on your X settings, content posted publicly may be visible to third parties. Avoid sharing personal information in public posts.

Established: January 13, 2026