Privacy Policy

This Privacy Policy explains how JJStudio (the "Developer") collects, uses, and protects personal information in connection with the use of the mobile application GameStack (the "App").

1. Personal Information We Collect

The App does not require users to directly provide personal identifying information (such as name or email). However, the following information may be automatically generated and collected during service use:

• Device identifiers (ADID, IDFA, etc.)
• Usage records, access logs, cookies
• Device information (model, OS version)

2. Purpose of Collection and Use

Collected information is used for the following purposes:

• Advertising: Providing personalized ads and limiting ad frequency (uses Google AdMob SDK)
• Service improvement: Fixing bugs and optimizing app performance

3. Third-Party Sharing and Processing

The App uses external services to provide smooth operation, and data may be transmitted to these providers. They manage data according to their own privacy policies.

• Google AdMob (Google Ireland Limited): View privacy policy

4. Retention and Deletion

The Developer does not directly store personal information within the App. Information collected through third-party services (such as AdMob) is retained and deleted according to those services' policies.

5. Your Rights

Users can opt out of personalized ads or reset their advertising identifier through device settings.

• iOS: Settings > Privacy & Security > Tracking
• Android: Settings > Google > Ads > Delete advertising ID

6. Contact

If you have any questions about this policy, please contact us:

Email: tgms021@gmail.com

Last updated: January 17, 2026