PRIVACY

Privacy Policy

Effective: 10 September 2026

Game and account data

Guest progress can be stored locally. If you create an account, progress, settings, achievements, Academy mastery, cloud saves and competition records may be stored on our servers for sync and social features.

Product analytics

The product records limited first-party events such as app opens, puzzle starts, completions and feature usage. Passwords, full Sudoku board contents and arbitrary private text are not intended to be analytics properties.

Advertising

Android and iOS builds use Google Mobile Ads with Google User Messaging Platform consent handling. Advertising SDKs can process device identifiers, ad interaction data and other information according to the user's consent choices, device settings and Google's policies. The game has no VIP, subscription, paid unlock, StoreKit purchase or Google Play Billing flow.

Privacy choices

Where required, the mobile apps expose Google's privacy options form so advertising consent choices can be reviewed. Device-level privacy controls also continue to apply.

Security

Production sessions use secure cookies where HTTPS is enabled, authenticated mutations use CSRF protection, and sensitive configuration stays outside public source files.

Changes

This policy may be updated as store declarations, advertising configuration and notification services are finalized. The current version remains available at this URL.