Privacy Policy
This Privacy Policy explains what information the Sudoku Master - Brain Challenge app ("the App", "we", "us", "our") collects, how it is used, and your choices, when you download and use the App on your Android device.
By using the App, you agree to the collection and use of information as described in this policy. If you do not agree, please do not use the App.
1. Information We Collect
1.1 Information Stored on Your Device
The App saves puzzle progress, game settings, statistics, and preferences directly on your device. This data stays on your device and is not automatically transmitted to us unless described elsewhere in this policy.
If you uninstall the App or clear its data, this locally stored information may be permanently lost.
1.2 Advertising Identifiers
The App uses Google AdMob to display advertising. To do this, the App and its advertising partners may collect and use:
- Your Android Advertising ID (AAID) — a resettable, non-permanent device identifier used for interest-based advertising and measuring ad performance.
- Information available through the Android Privacy Sandbox (Topics API and Attribution API), where supported by your device and Android version, used for privacy-preserving interest-based advertising and ad attribution without relying solely on a persistent identifier.
You can reset or limit your Advertising ID, and manage ad personalization, in your device's Google Settings (Settings > Google > Ads).
1.3 Analytics Data
The App uses Google Analytics for Firebase to understand how the App is used and to improve performance and stability. This may include:
- App usage events (e.g., screens viewed, features used, game mode selected, session length)
- Device and app information (device model, operating system version, app version, language, general/coarse location derived from IP, crash and performance data)
- An app-instance identifier generated by the Firebase/Google Analytics SDK (not your name or contact details)
1.4 Technical and Diagnostic Data
The App may collect basic technical logs for troubleshooting, security, and stability, such as error/crash reports, device model, OS version, and app version. These are used to fix bugs and are not used to identify you personally.
1.5 Information You Provide
If the App includes a leaderboard, feedback form, or support contact option, we may collect what you choose to submit (such as a display name, message content, or contact email), solely to provide that feature or respond to you. Please do not submit real personal information as a public display name.
We do not collect your precise GPS location, contacts, camera, microphone, or files on your device — the App does not request these permissions.
2. Permissions Used by the App
The App requests the following Android permissions, used only for the purposes below:
| Permission | Purpose |
|---|---|
Internet (INTERNET) | Load ads, send analytics, and any online features |
Network state (ACCESS_NETWORK_STATE) | Check connectivity before loading online content |
Wake lock (WAKE_LOCK) | Keep the device awake during gameplay/background tasks when needed |
| Foreground service | Support background processing (e.g., ad loading, scheduled tasks) without interrupting gameplay |
Advertising ID (AD_ID) / Ad Services permissions | Support AdMob advertising and attribution as described in Section 1.2 |
3. Advertising
The App displays ads served through Google AdMob. Google and its advertising partners may use advertising identifiers, cookies, or similar technologies to serve ads, measure their performance, prevent fraud, and personalize ads based on your activity in this App and other apps or sites, subject to your consent choices.
Where required by law (for example, in the EEA, UK, or Switzerland, or under other applicable regulations), the App will show a consent management prompt (via Google's User Messaging Platform) before using ads-related identifiers or personalized advertising, and you can change your choice at any time through the in-app privacy/consent settings.
You can learn more about Google's advertising practices and manage ad settings at:
policies.google.com/technologies/ads
support.google.com/ads/answer/2662922
4. How We Use Information
We use the information described above to:
- Operate and provide the App's features and save your progress
- Display and measure advertising, and support ad-supported free access to the App
- Understand usage patterns and improve the App's design, performance, and stability
- Diagnose crashes, bugs, and technical issues
- Prevent fraud, spam, and abuse
- Respond to support requests, if you contact us
- Comply with legal obligations
We do not sell your personal information.
5. Third-Party Service Providers
The App uses the following third-party services, which may process data as described in their own privacy policies:
- Google AdMob / Google Mobile Ads SDK
- Google Analytics for Firebase
- Google Play Services (including App Set ID, ad services)
These providers may process data on servers located outside your country, including in the United States.
6. Data Retention
We retain information only as long as reasonably necessary for the purposes described in this policy — operating the App, improving it, preventing abuse, and meeting legal requirements. Analytics and advertising data are generally retained according to Google's own retention schedules, which you can review in the linked policies above. Locally stored data on your device remains until you clear app data or uninstall the App.
7. Your Choices
- Advertising ID: Reset or opt out of ad personalization via Settings > Google > Ads on your Android device.
- Ad consent (where applicable): Adjust your consent choice at any time via the App's privacy settings menu.
- App data: Clear locally stored progress via your device's App Info > Storage > Clear Data, or by uninstalling the App.
- Deletion/access requests: To ask about, correct, or request deletion of information you believe we hold about you, contact us using the details in Section 10. We may be unable to fulfill certain requests where retention is required for security, fraud prevention, or legal reasons.
8. Children's Privacy
The App is intended for a general audience and is not directed at children under 13 (or the relevant age of digital consent in your region). We do not knowingly collect personal information from children beyond what is necessary for basic app operation and nonpersonalized advertising where required. If you believe a child has provided us with personal information, please contact us so we can address it.
This App is not listed under Google Play's Families program and is not directed at children. It is intended for a general, mixed-age audience.
9. Changes to This Policy
We may update this Privacy Policy when the App, its features, or applicable legal requirements change. Material changes will be reflected by updating the "Last updated" date above, and where appropriate, through an in-app notice.
10. Contact Us
If you have questions about this Privacy Policy or how your information is handled, contact us at: