Privacy Policy.

Introduction

This Privacy Policy describes how Sudoku ("we", "our", or "the app") collects, uses, and shares information when you use our mobile application.

Information We Collect

1. Information You Provide

Account Information

• Email address (via Sign in with Apple, Google Sign-In, or Facebook Login)
• Display name
• Profile picture (optional, from your Apple/Google/Facebook account)

Game Data

• Puzzle completion times
• Difficulty preferences (including custom difficulty settings)
• Statistics (games played, win rates, streaks, hints used, mistakes)
• Leaderboard scores (if you choose to submit)
• Saved game states (up to 3 cloud save slots)
• Achievement progress

2. Automatically Collected Information

Device Information

• Device type and model
• Operating system version
• Unique device identifiers
• App version

Usage Data

• App interactions and features used
• Crash reports and error logs
• Performance metrics

Advertising Data

• Ad impressions and interactions
• Advertising identifiers (IDFA on iOS, AAID on Android)
• IP address (for ad serving and fraud prevention)

3. Platform Gaming Services

Game Center (iOS) / Google Play Games (Android)

• Player display name (for leaderboards)
• Player profile photo (optional, displayed in-app)
• Achievement unlocks and progress
• Leaderboard scores and rankings

How We Use Your Information

We use the collected information to:

1. Provide App Features

• Save your game progress across devices
• Display leaderboards and rankings
• Sync data across your devices (cloud sync)
• Track your statistics and achievements
• Manage cloud save slots

2. Improve the App

• Fix bugs and crashes
• Analyze app usage patterns
• Optimize performance
• Develop new features

3. Advertising

• Display relevant ads
• Measure ad performance
• Prevent ad fraud

4. Analytics

• Understand user behavior
• Improve user experience
• Track retention and engagement

Third-Party Services

We use the following third-party services that may collect information:

Firebase (Google)

• Purpose: Authentication, database, analytics, crash reporting
• Data Collected: Account info, game data, device info, usage data
• Privacy Policy: firebase.google.com/support/privacy

Google AdMob

• Purpose: Advertising
• Data Collected: Ad interactions, device info, advertising ID
• Privacy Policy: policies.google.com/privacy

Google Sign-In

• Purpose: User authentication
• Data Collected: Email, name, profile picture
• Privacy Policy: policies.google.com/privacy

Sign in with Apple

• Purpose: User authentication
• Data Collected: Email (optional), name (optional)
• Privacy Policy: apple.com/legal/privacy

Facebook Login

• Purpose: User authentication
• Data Collected: Email, name, profile picture
• Privacy Policy: facebook.com/privacy/policy

Game Center (Apple)

• Purpose: Leaderboards, achievements, player identification
• Data Collected: Player display name, profile photo, game progress
• Privacy Policy: apple.com/legal/privacy

Google Play Games Services

• Purpose: Leaderboards, achievements, player identification
• Data Collected: Player display name, profile photo, game progress
• Privacy Policy: policies.google.com/privacy

Data Sharing

We may share your information with:

1. Service Providers

• Google (Firebase, AdMob, Sign-In, Play Games)
• Apple (Sign in with Apple, Game Center)
• Facebook (Facebook Login)
• Ad network partners (if mediation is enabled)

2. Public Information

• Leaderboard scores (display name and completion times only)
• These are visible to all app users

3. Legal Requirements

• When required by law
• To protect our rights or safety

Your Choices

Account Data

• Delete Account: You can delete your account in the app settings
• Sign Out: You can sign out at any time
• Data Portability: Contact us to request your data

Cloud Sync

• Disable Cloud Sync: You can disable cloud sync in settings to keep data local only
• Save Slots: You can manage and delete individual save slots

Advertising

• iOS: Settings > Privacy > Tracking > Disable "Allow Apps to Request to Track"
• Android: Settings > Google > Ads > Opt out of Ads Personalization
• Premium Subscription: Remove all ads by upgrading to premium

Analytics

We use Firebase Analytics which respects device-level analytics settings.

Data Retention

• Active Accounts: Data retained while your account is active
• Deleted Accounts: Data deleted within 30 days of account deletion
• Leaderboard Scores: May be retained for historical rankings
• Cloud Save Data: Deleted when account is deleted or manually cleared
• Legal Requirements: Some data retained as required by law

Children's Privacy

Our app is not directed to children under 13. We do not knowingly collect personal information from children under 13. If you believe we have collected information from a child under 13, please contact us immediately.

Data Security

We implement reasonable security measures to protect your information:

• Encrypted data transmission (HTTPS/SSL)
• Secure authentication (OAuth 2.0)
• Firebase security rules
• Secure local storage for sensitive data
• Regular security updates

However, no method of transmission over the internet is 100% secure.

International Users

Your information may be transferred to and processed in countries other than your own. By using the app, you consent to such transfers.

GDPR Rights (EU Users)

• Right to access your data
• Right to rectification
• Right to erasure ("right to be forgotten")
• Right to data portability
• Right to object to processing

CCPA Rights (California Users)

• Right to know what personal information is collected
• Right to delete personal information
• Right to opt-out of sale (we don't sell data)

Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of material changes by:

• Updating the "Last Updated" date
• Displaying an in-app notice
• Sending an email (if you've provided one)

Continued use of the app after changes constitutes acceptance of the updated policy.

Contact Us

If you have questions about this Privacy Policy or want to exercise your rights:

• Email: info@locksmithcreativemilan.com
• GitHub: github.com/lockymic/Docs

Your Consent

By using Sudoku, you consent to this Privacy Policy.