Privacy Policy

Last Updated: October 2025

Introduction

Social Sudoku ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, and safeguard your information.

Information We Collect

Information You Provide

  • Account Information: Email address or phone number for authentication
  • Display Name: A friendly name you choose (can be auto-generated)
  • Preferences: Accessibility settings, theme choices, sound preferences

Automatically Collected Information

  • Game Activity: Puzzles started, completed, hints used, completion times
  • Usage Data: Aggregate analytics (cookieless) about feature usage

Information We Do NOT Collect

  • Real names (unless you choose to use one as your display name)
  • Date of birth or age
  • Precise location data
  • Browsing history outside our site
  • Device fingerprints or tracking identifiers

How We Use Your Information

  • Provide and improve our services
  • Enable social features (friends, leaderboards)
  • Send check-in notifications (if you're linked to a guardian)
  • Respond to support requests
  • Detect and prevent fraud or abuse
  • Comply with legal obligations

Information Sharing

We do NOT sell or rent your personal information. We may share data only:

  • With Your Consent: Such as sharing activity with linked guardians
  • Service Providers: Hosting (Vercel), database (Supabase), email/SMS services
  • Legal Requirements: When required by law or to protect rights

Data Security

We implement industry-standard security measures:

  • HTTPS encryption for all data transmission
  • Secure, hashed authentication
  • Regular security updates
  • Limited access to personal data

Your Rights

You have the right to:

  • Access: Request a copy of your data
  • Correction: Update incorrect information
  • Deletion: Request account deletion
  • Portability: Receive your data in a portable format
  • Opt-Out: Disable notifications or social features

Cookies and Tracking

We use minimal cookies:

  • Essential Cookies: For authentication and session management
  • Preference Cookies: To remember your settings (localStorage)
  • No Tracking Cookies: We do not use advertising or tracking cookies

Our analytics are cookieless and aggregated (via Plausible or Cloudflare Web Analytics).

Guardian and Check-In Features

If you link your account to a guardian, they can view your activity summary and receive notifications if you haven't played in 4 days. This feature is optional and can be disabled at any time.

Important: Check-in notifications are informational only and not a medical, emergency, or wellness monitoring service.

Third-Party Services

We use:

  • Supabase: Database and authentication
  • Vercel: Web hosting
  • Google AdSense: Advertising (senior-safe categories only)
  • Amazon Associates: Affiliate links

These services have their own privacy policies.

Children's Privacy

Our service is designed for adults 55+. We do not knowingly collect information from children under 13.

International Users

We comply with GDPR (EU) and CCPA (California). Your data may be processed in the United States.

Changes to This Policy

We may update this policy occasionally. We'll notify you of significant changes via email or site notice.

Contact Us

Questions about privacy? Contact us: