Privacy Policy

Sudoku Classic — Last updated: June 17, 2026

This page informs you of our policies regarding the collection, use, and disclosure of personal data when you use the Sudoku Classic mobile application (the "App").

1. Information We Collect

We do not directly collect any personally identifiable information. However, third-party services integrated into the App may collect certain data automatically:

Device identifiers (Advertising ID, Android ID)
Usage data (app events, session duration, in-app actions)
Device information (model, OS version, language, time zone)
IP address (used to determine approximate location for ad targeting)

2. Third-Party Services

The App uses the following third-party services that may collect data:

Google AdMob
Used to display advertisements. AdMob may collect device identifiers and usage data to serve personalized or non-personalized ads.
Google Privacy Policy — AdMob Data Collection

Google Firebase Analytics
Used to understand how users interact with the App. Firebase collects anonymized usage events and device information.
Firebase Privacy Policy

3. How We Use Information

The data collected by third-party services is used to:

Display relevant advertisements within the App
Analyze App usage to improve user experience
Monitor App performance and fix issues

4. Advertising

The App displays advertisements provided by Google AdMob. These ads may be personalized based on your interests using your Advertising ID. You can opt out of personalized advertising at any time by visiting your device settings:

Android: Settings → Google → Ads → Opt out of Ads Personalization

5. Data Retention

We do not store any personal data on our servers. Data collected by Google AdMob and Firebase Analytics is retained according to their respective privacy policies. Game progress and settings are stored locally on your device using localStorage and are never transmitted to our servers.

6. Children's Privacy

The App is not directed to children under the age of 13. We do not knowingly collect personal information from children under 13. If you are a parent or guardian and believe your child has provided personal information, please contact us so we can take appropriate action.

7. Data Security

We take reasonable precautions to protect your information. However, no method of transmission over the Internet or electronic storage is 100% secure. We cannot guarantee absolute security of your data.

8. Your Rights

Depending on your location, you may have the right to:

Access the personal data held about you
Request deletion of your personal data
Opt out of personalized advertising
Lodge a complaint with a supervisory authority

To exercise these rights, please contact us at the email address below.

9. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the "Last updated" date. You are advised to review this Privacy Policy periodically for any changes.

10. Contact Us

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

Email: [email protected]
App: Sudoku Classic