Privacy Policy

1. Information we collect

• Account information such as username, email address, encrypted password, preferred language, and optional profile preferences when you register voluntarily.
• Gameplay data including saved puzzle progress, completion times, hints used, errors, scores, and leaderboard visibility preferences.
• Technical information such as IP address, browser family, device type, operating system, visited pages, and timestamps required for security, diagnostics, and analytics.
• Cookie and local storage data used to keep your session active, remember preferences, and store consent decisions.

2. How we use your information

• To authenticate your account and keep the service operational.
• To save puzzle progress, restore your games across sessions, and generate personal statistics.
• To improve gameplay, stability, accessibility, and content quality.
• To detect abuse, secure the infrastructure, and comply with legal obligations.

3. Information sharing

PrintSudoku does not sell your personal information. Data may be shared only when necessary with infrastructure providers, analytics or advertising partners configured on the site, or when required by law, security, or fraud prevention needs.

4. Security

• Passwords are stored using one-way hashing.
• Administrative access is restricted to authorised operators.
• Transport security and routine backups are used where available in the deployment environment.
• No internet service can guarantee absolute security, but reasonable safeguards are applied.

5. Data retention

Account and gameplay data is retained for as long as needed to provide the service, resolve disputes, enforce agreements, and meet legal or operational requirements. If an account is deleted, related information is removed or anonymised unless retention is legally required.

6. Your rights

• Request access to the personal data associated with your account.
• Ask for correction of inaccurate or outdated information.
• Request deletion of your account data where legally possible.
• Object to or restrict certain processing where applicable.

7. Cookies and similar technologies

• Essential cookies support authentication, language, and session continuity.
• Analytics cookies help understand site usage patterns when enabled by consent.
• Advertising scripts may set or access their own identifiers when accepted.

8. Children

PrintSudoku is intended for a general audience. If you believe personal data from a child has been submitted inappropriately, contact the site operator so it can be reviewed and removed where necessary.

9. International transfers

Depending on hosting and third-party services, information may be processed in countries other than your own. Where that occurs, commercially reasonable steps are taken to apply appropriate safeguards.

10. Changes to this policy

This policy may be updated from time to time to reflect product, operational, or legal changes. The updated version becomes effective when published on this page.

11. Contact

If you need to exercise access, rectification, deletion, or consent rights, use the contact section on the About page or write to diego.garcia.morate@gmail.com.