Privacy Policy

Overview

Sudoku Puzzle Generator is an independently developed app. Your privacy matters. This policy explains what limited information may be collected when you use the app and how it is used.

Information We Do Not Collect

Sudoku Puzzle Generator is not designed to collect information that directly identifies you personally. For example, we do not ask for or intentionally collect:

• ✗Names, email addresses, or contact information
• ✗Device advertising IDs (IDFA)
• ✗Location data
• ✗Any other personal or sensitive data

On-Device Processing

All puzzle generation, solving, and export operations happen entirely on your device. Your puzzle content, generated books, and export results are not uploaded by the app as part of normal use. The app does not require an internet connection to function.

App Settings & Local Storage

The app remembers your preferences (such as chosen difficulty or grid size) on your device. These settings are stored locally so the app can remember your choices.

In-App Purchases

In-app purchases are processed entirely by Apple through the App Store. The developer does not receive, process, or store any payment information, billing details, or financial data. Please refer to Apple's Privacy Policy for details on how Apple handles purchase data.

Analytics

The app uses Firebase Analytics to collect limited app usage information, such as general interaction data and feature usage. This helps us improve the app and understand which parts of the experience are most useful.

We do not use analytics to identify you by name, email address, or other directly identifying information. Please refer to Google's Privacy Policy for details on how Google handles this data.

Children's Privacy

We do not knowingly collect personal information from children under 13 (or the applicable age in your jurisdiction). If you believe a child has provided personal information to us, please contact us so we can address the issue.

Changes to This Policy

If this privacy policy changes materially, the updated policy will be posted on this page with a revised effective date.

Contact

Questions about this privacy policy? Reach out at sudoku@twinkle.hk.