ilsudoku.it

Privacy Policy

This Privacy Policy describes how ilsudoku.it (“we”, “the Service”) collects, uses, and protects information when you visit our website. We are committed to protecting your privacy and complying with the General Data Protection Regulation (GDPR) and applicable EU privacy laws.

Data Controller

The data controller for this website is the operator of ilsudoku.it. For privacy-related inquiries, please use the contact information provided in the website footer.

What Data We Collect

Data stored on your device (not collected by us)

Game progress, preferences (theme, language, input mode, layout), and daily puzzle state are stored in your browser’s localStorage. This data never leaves your device and is not accessible to us.

Anonymous analytics (with your consent)

When you consent to analytics cookies, we collect anonymous usage data through PostHog, an analytics platform hosted in the European Union. This includes:

  • Page views and navigation patterns
  • Game interactions (e.g., starting a game, completing a puzzle, using hints)
  • Device type, browser, and screen size (no fingerprinting)
  • Error reports and performance metrics
  • Session recordings for a small sample of sessions (~5%), capturing gameplay interactions

All analytics data is anonymous. We do not collect your name, email address, IP address (it is discarded by our analytics proxy), or any personally identifiable information.

What we do NOT collect

  • No personal information (name, email, phone number)
  • No user accounts or passwords
  • No payment information
  • No location data beyond country-level (derived from anonymous analytics)

Legal Basis for Processing

  • Necessary functionality (legitimate interest, Art. 6(1)(f) GDPR) — storing game state and preferences locally to provide the service you requested.
  • Analytics (consent, Art. 6(1)(a) GDPR) — anonymous usage analytics are only activated after you give explicit consent via the cookie banner.

Third-Party Services

  • PostHog (analytics) — EU-hosted analytics platform. Data is processed in the EU. PostHog Privacy Policy.
  • Cloudflare (hosting & CDN) — provides website hosting, content delivery, and standard security protections (DDoS mitigation). Cloudflare Privacy Policy.

International Data Transfers

Analytics data is processed by PostHog in the European Union (EU region). Website hosting and delivery are provided by Cloudflare, which may process requests at edge locations worldwide but does not store personal data on our behalf. We do not intentionally transfer personal data outside the EU/EEA.

Data Retention

  • Local storage data — persists on your device until you clear your browser data.
  • Analytics data — retained by PostHog according to their standard retention policies.

Your Rights Under GDPR

You have the right to:

  • Withdraw consent — change your cookie preferences at any time via the cookie settings in the footer.
  • Erasure — clear all local data by clearing your browser’s site data. Analytics data is anonymous and cannot be linked to you.
  • Object to processing — opt out of analytics by declining analytics cookies.
  • Lodge a complaint — you may file a complaint with your local data protection authority.

Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page. We encourage you to review this page periodically.