Privacy Policy

Introduction

At Sudoku365, we take your privacy seriously. This Privacy Policy explains how we collect, use, and protect your information when you use our website.

The short version: We collect minimal data, store everything locally in your browser, and don't track you across the web.

Information We Collect

Information You Provide

We do not require user registration or accounts. You can use Sudoku365 completely anonymously.

If you contact us via email, we will have access to the information you choose to provide in your message (email address, name if provided, and message content).

Automatically Collected Information

When you visit Sudoku365, our web server automatically collects standard log information, including:

• Your IP address
• Browser type and version
• Pages visited
• Date and time of visit
• Referring website (if you came from another site)

This information is collected by our web hosting provider and is used solely for security purposes and to understand general traffic patterns. We do not use this data for marketing or share it with third parties.

Local Storage (Browser-Side Data)

To enhance your experience, Sudoku365 uses your browser's Local Storage feature to save:

• Game progress: Your current state in incomplete puzzles
• Preferences: Dark mode setting, game mode (paper vs. auto-check)
• Statistics: Completion times and dates for puzzles you've solved

Important: This data is stored entirely in your browser. We never see this data, and it never leaves your device. You can clear this data at any time through your browser settings.

Cookies

Sudoku365 does not use cookies. All persistent data is stored using browser Local Storage, which is not transmitted to our servers with each request.

Third-Party Services

Analytics

We do not use Google Analytics or any other third-party analytics services. We respect your privacy and prefer to rely on server logs for basic traffic information.

Advertising

We do not display advertisements on Sudoku365.

External Links

Our website may contain links to external sites. We are not responsible for the privacy practices of other websites. We encourage you to read the privacy policies of any linked sites you visit.

How We Use Your Information

The minimal information we collect is used to:

• Provide and maintain the Sudoku365 service
• Ensure website security and prevent abuse
• Understand general usage patterns to improve the site
• Respond to your inquiries if you contact us

We do not:

• Sell your data to third parties
• Use your data for marketing purposes
• Track you across other websites
• Create user profiles for advertising

Data Retention

Server logs are typically retained for 90 days for security purposes, then automatically deleted.

Email correspondence is retained as long as necessary to provide support or respond to inquiries.

Local Storage data remains in your browser until you manually clear it.

Children's Privacy

Sudoku365 is suitable for all ages, including children. Because we don't collect personal information or require registration, there are no special provisions for children under 13. Parents can feel confident that their children can use Sudoku365 safely.

We do not knowingly collect personal information from children. If you believe we have inadvertently collected such information, please contact us immediately.

Your Rights

You have the right to:

• Access: Request information about what data we have (though we collect very little)
• Deletion: Request deletion of any data associated with you (primarily email correspondence)
• Opt-out: Stop using our services at any time
• Clear local data: Delete Local Storage data through your browser settings

To exercise these rights, contact us at hello@sudoku365.com.

Security

We implement reasonable security measures to protect our website and servers:

• HTTPS encryption for all pages
• Regular security updates to server software
• Monitoring for suspicious activity

However, no method of transmission over the internet is 100% secure. While we strive to protect your information, we cannot guarantee absolute security.

International Users

Sudoku365 is accessible worldwide. If you are accessing our site from outside the United States, please be aware that your information may be transferred to, stored, and processed in the United States or other countries where our servers are located.

Changes to This Privacy Policy

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

• Updating the "Last Updated" date at the top of this policy
• For material changes, displaying a notice on our homepage

Your continued use of Sudoku365 after changes become effective constitutes acceptance of the revised policy.

GDPR Compliance (European Users)

If you are located in the European Economic Area (EEA), you have additional rights under the General Data Protection Regulation (GDPR):

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

Since we collect minimal personal data (primarily through email contact), these rights are easily exercised by contacting us.

California Privacy Rights (CCPA)

California residents have specific rights under the California Consumer Privacy Act (CCPA):

• Right to know what personal information is collected
• Right to know if personal information is sold or disclosed
• Right to opt-out of sale of personal information
• Right to deletion
• Right to non-discrimination

Important note: We do not sell personal information and collect minimal data as described in this policy.

Contact Us

If you have questions about this Privacy Policy or our data practices, please contact us:

Email: hello@sudoku365.com

We will respond to privacy-related inquiries within 30 days.