Privacy Policy

Effective date: November 7, 2026

Camera Sudoku is an Android app from Northforce Apps for scanning, playing and solving Sudoku puzzles. It does not need an account or sign-in.

This policy explains what stays on your device, what leaves it, and the choices you have. It replaces the earlier Camera Sudoku privacy policy dated June 6, 2025.

1. Summary

• Camera images are processed on your device and are not uploaded.
• Your puzzles, progress and settings are stored on your device.
• The free version shows ads from Google AdMob. In the EEA, the UK and Switzerland you are asked for consent first.
• We use Google Firebase to understand app usage and fix crashes.
• Purchases are handled by Google Play.
• We do not sell your personal data.

2. On Your Device

• Camera. Scanning happens entirely on your phone. Photos are not uploaded, and normal scans keep only the resulting puzzle.
• Puzzles and settings. Saved puzzles, progress, scores, settings and your Pro status are stored in the app's private storage. If Android backup is turned on, Android may include this data in your own Google device backup, which we cannot access.
• Clipboard. Used only when you tap import or export.

3. What Leaves Your Device

Data leaves your device only to the Google services below. They never receive your photos or the contents of your puzzles.

3.1 Advertising (Google AdMob)

The free version shows ads, including optional rewarded ads. To serve and measure ads and to prevent fraud, Google receives your device's Advertising ID, IP address (used for approximate location), ad interactions and diagnostic information. Depending on your region and choices, ads may be personalised or non-personalised.

• EEA, UK and Switzerland: you are asked for consent before ads are requested, and you can change your choice at any time in Settings → Privacy → Ad privacy choices.
• All regions: you can reset or delete your Advertising ID, or opt out of ads personalisation, in your Android settings.
• Pro: Camera Sudoku Pro removes all ads.

See How Google uses information from sites or apps that use its services.

3.2 Usage analytics and crash reports (Google Firebase)

Firebase Analytics and Firebase Crashlytics receive pseudonymous information about how the app is used (for example which features are used and whether a scan succeeded), crash reports, device and app information (such as device model, Android version and app version), approximate location derived from the IP address, and app-instance identifiers. We use this only to improve the app and fix problems, not to build advertising profiles.

3.3 Purchases (Google Play)

Camera Sudoku Pro is a one-time purchase through Google Play. Google processes the payment; we never receive your payment details. The app stores your Pro status on your device.

3.4 Emails you send us

If you choose to send a bug report or feature request, the app opens a draft in your own email app. A bug report draft may include basic device and app information and, for camera problems, photos of the puzzle. Nothing is sent unless you send it. We use your message only to reply and fix the problem.

4. Permissions

The only permission the app asks for is the camera, used for scanning. The rest of the app works without it. The app also uses internet access for ads, purchases, analytics and crash reports; scanning, playing and solving work offline.

5. Third-Party Privacy Policies

• Google Privacy Policy
• AdMob and ads privacy
• Firebase privacy and security

6. Legal Bases (EEA, UK and Switzerland)

• Ads personalisation and ad-related storage: your consent, which you can withdraw at any time in Settings → Privacy → Ad privacy choices.
• Analytics and crash reports: our legitimate interest in keeping the app working and improving it.
• Purchases: performance of the contract when you buy Pro.
• Support emails: our legitimate interest in answering you.

7. Data Retention

• On your device: until you delete it in the app, clear the app's data, or uninstall.
• Analytics: kept for at most 14 months.
• Crash reports: kept for 90 days.
• Advertising data: kept by Google under Google's policies.
• Emails: kept only as long as needed to handle your request.

8. Your Choices and Rights

• Change your ad consent in Settings, manage your Advertising ID in Android settings, or remove ads with Pro.
• Deny or revoke the camera permission at any time.
• Delete saved puzzles in the app, or uninstall to remove all local data and reset the identifiers used by analytics.
• Depending on where you live (for example under the GDPR), you may have the right to access, correct, delete, restrict or object to the processing of your personal data, and to withdraw consent. Because the app has no accounts, we usually cannot link analytics data to you, but we will help as far as we can. You may also lodge a complaint with your data protection authority.

9. Children

Camera Sudoku is a general-audience app and is not directed at children under 13. We do not knowingly collect personal information from children. If you believe a child has sent us personal information, contact us and we will delete it.

10. Website

This policy is published at https://northforceapps.com/camerasudoku/privacy.html. The website may use Google Analytics to measure page visits.

11. Changes and Contact

We may update this policy when the app changes. The latest version is always at the address above, with an updated effective date.

Contact: northforceapps@protonmail.com