Privacy Policy

Last updated: May 19, 2026

1. Introduction

Killer Sudoku ("we", "our", or "us") is committed to protecting your privacy. This Privacy Policy explains how we handle data in our Killer Sudoku iOS application.

Important: Our app is designed to be 100% offline. We do not collect, store, or transmit any personal data from your device.

2. Information We Do NOT Collect

We want to be completely transparent: Killer Sudoku does not collect any of the following:

Personal information (name, email, phone number, etc.)
Location data or GPS information
Usage analytics or tracking data
Device identifiers or advertising IDs
Photos, contacts, or any personal files
Financial information or payment data
Health or fitness data

            Zero Data Collection: Our app operates entirely offline. No network requests are made, no data leaves your device, and no third-party services have access to your information.
        

3. Data Stored on Your Device

Killer Sudoku stores the following data locally on your iOS device using Apple's UserDefaults system:

Game Progress: Your current puzzle state (filled cells, notes, timer)
Best Times: Your fastest completion times for each difficulty level
Completed Games Count: Number of puzzles completed per difficulty

This data is:

Stored only on your device
Never transmitted to any server
Automatically deleted when you uninstall the app
Accessible only to the Killer Sudoku app (iOS sandbox protection)

4. Third-Party Services

Killer Sudoku does not use any third-party services, SDKs, or analytics tools.

The app contains:

No advertising networks
No analytics services (such as Firebase, Google Analytics, etc.)
No social media integrations
No crash reporting services
No tracking or attribution services

5. Data Security

Since all data remains on your device and is never transmitted, there is no risk of data interception during transmission or server-side breaches.

iOS provides built-in security through:

App Sandbox: Each app's data is isolated and protected
Device Encryption: iOS devices encrypt data at rest
Access Control: Only your app can access its UserDefaults data

6. Data Deletion

All local game data is automatically and permanently deleted when you:

Uninstall the Killer Sudoku app from your device
Erase all content and settings on your iOS device

No data recovery is possible after deletion, as we maintain no servers or backups.

7. Children's Privacy

Killer Sudoku is appropriate for users of all ages. Since we do not collect any personal information, we do not knowingly collect data from children under 13 or any other age group.

Parents can be confident that:

No personal data is collected from their children
No behavioral advertising is present
No third-party tracking occurs
The app is completely safe for offline puzzle solving

8. Changes to This Policy

We may update this Privacy Policy from time to time. If we make material changes, we will notify you by updating the "Last updated" date at the top of this policy.

We encourage you to review this Privacy Policy periodically.

9. Contact Us

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

Email: privacy@ai50team.com

10. Apple App Privacy Labels

Below is a summary of our data practices as required by Apple's App Privacy labels:

Data Type	Collected?	Purpose
Contact Info	❌ No	Not collected
Health & Fitness	❌ No	Not collected
Financial Info	❌ No	Not collected
Location	❌ No	Not collected
Sensitive Info	❌ No	Not collected
Contacts	❌ No	Not collected
User Content	❌ No	Not collected
Browsing History	❌ No	Not collected
Search History	❌ No	Not collected
Identifiers	❌ No	Not collected
Purchases	❌ No	Not collected
Usage Data	❌ No	Not collected
Diagnostics	❌ No	Not collected
Other Data	❌ No	Not collected

            Summary: Killer Sudoku does not collect any data. All game progress and settings are stored locally on your device and are never transmitted to any server or third party.
        