Daily Killer Sudoku
Privacy Policy

1. Information Collection and Use

• Game Progress (localStorage): Level completions, star ratings, solve times, unlocked levels, daily challenge streaks, and theme preferences are all stored locally in your browser. Clearing your browser data will reset your progress.
• No Account Required: The game has no login, no registration, and no user profiles. We never ask for your name, email, or any personal information to play.
• Puzzle Seeds: Levels are procedurally generated from a deterministic seed. No puzzle data is fetched from or sent to a server — all generation happens in your browser.

2. Third-Party Services (Advertising)

The game uses Google AdMob to display advertisements. AdMob may collect and use information to serve ads:

• Google AdMob: May collect your device's Advertising ID, IP address, browser type, and usage data to provide personalised advertisements. This is governed by Google's own privacy policy.
• Opting Out: You can limit personalised advertising through your device's advertising settings, or by visiting adssettings.google.com.

For more information: Google Privacy Policy · AdMob Privacy FAQ

3. Log Data and Analytics

In the case of a bug or error, we may receive anonymous crash information through browser error reporting. This may include your browser type, operating system version, the page URL, and a stack trace. This data is entirely anonymous, never linked to your identity, and used exclusively to fix bugs.

4. Cookies and Local Storage

The game uses browser localStorage (not cookies) to save your game state. This data never leaves your device and is not accessible to us or any third party. You can clear it at any time through your browser's settings — though this will reset your progress.

5. Children's Privacy

We are committed to complying with all applicable laws and regulations relating to children, including the US Children's Online Privacy Protection Act (COPPA), the EU General Data Protection Regulation (GDPR), and the Google Play Families Policy.

• Child-Appropriate Content: We ensure all content in our apps is appropriate for children.
• Safe Advertising: If we display ads to users identified as children (e.g., via a neutral age screen), we only use Google Play certified ad networks. We ensure these ads are appropriate for children and do not use personalized advertising or collect personally identifiable information.
• No Data Collection: We do not knowingly collect personally identifiable information from children under 13. If we discover that a child under 13 has provided us with personal information, we immediately delete it. If you believe your child has provided us with personal information, please contact us.

6. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Changes are effective immediately upon posting to this page. We advise reviewing this page periodically to stay informed of any updates.