Privacy Policy

App: mSudoku (com.dreamingscientist.veteran_sudoku). Last updated: 2026-10-30.

Who we are

mSudoku is published by Vu Khac Muoi. For privacy questions, email apps.dreamingscientist@gmail.com.

Data stored on your device

mSudoku keeps app content, settings, and progress on your device. We do not operate a cloud synchronization service for this data. Local data is normally removed when you uninstall the app, subject to backups managed by your device or store account.

Optional usage measurement

If you choose to allow analytics, mSudoku uses Google Analytics for Firebase to measure app sessions, engagement, screen views, and app-specific events such as puzzle starts and completions. Firebase associates these events with an app-instance identifier so usage can be measured over time. This is separate from Apple's advertising identifier (IDFA).

Analytics is optional and off unless you opt in. You can change your choice in the app's Settings. Declining analytics does not prevent gameplay or determine whether ads may be shown.

The app configures Firebase Analytics advertising storage, advertising user data, and ad-personalization consent as denied. On iOS, the app excludes Firebase advertising-ID support and disables IDFV collection. Analytics settings in Google Analytics or Firebase, including account links, audiences, Google signals, exports, and data sharing, must also be configured so usage events are not repurposed for advertising or cross-app tracking.

Advertising, ATT, and regional consent

mSudoku uses Google Mobile Ads and may show banner, rewarded, or interstitial ads. On iOS, the app asks for Apple's App Tracking Transparency (ATT) permission before starting Google's User Messaging Platform (UMP) advertising-consent flow. If you deny, restrict, or do not grant ATT, ads may still be requested and shown when Google's regional consent requirements allow it. The app does not treat a non-authorized ATT result as permission for IDFA-based tracking. ATT authorization alone does not replace regional advertising consent.

UMP may ask you for additional choices based on your region. Settings provides a Privacy Choices control when required. Depending on your choices and Google's ad-serving mode, Google and advertising partners may process device or advertising identifiers where permitted, IP address (which can indicate approximate location), ad interactions, diagnostics, crash information, and performance data. You can change ATT permission in iOS Settings; the app rechecks it when returning to the foreground.

Support messages

If you email us, we receive your email address and message. We use them only to respond, diagnose the reported issue, and improve support.

Children

The app is not directed to children under 13, and we do not knowingly collect personal information from children.

Your choices and rights

You may ask us to access, correct, or delete personal information associated with support messages or an account. If you are in the European Economic Area, you may also contact your local data protection authority.

Changes

We may update this policy when the app or applicable requirements change. The date above identifies the current version.