We take your privacy seriously. Here we explain what data we collect, how it is used, and what choices you have when you play on Sudokuen.com.
When using the service, technical data such as browser, operating system, device type and anonymized usage data are collected. If an account is created via Supabase, email address and authentication data are stored as part of the login solution.
The information is used to deliver core functionality, maintain stable operation, handle login, improve the service's performance and analyze usage patterns at an aggregated level.
We use essential cookies for authentication, saving game progress and technical functionality. Without them, the service cannot work as intended. You can change your cookie settings in your browser.
We use third-party providers where necessary for operation, storage or authentication. They can access data only to the extent required to deliver the service, and data processing agreements govern how they process it.
Users can request access to, correction of and deletion of personal data in accordance with applicable regulations. You can delete your account and associated data using the features available in the service while logged in.
Game data is stored locally in the browser with the option to synchronize to the account if the user is logged in. Deleting browser data may lead to loss of local progress.
The privacy policy may be updated when there are changes to the service or relevant routines. The last updated date reflects the current version.
Last updated: 16 November 2025