Privacy Policy
Last updated: March 2026
Article 01 — Who We Are
Sudoku Arena is a competitive sudoku application published by an independent developer. This Privacy Policy explains how we collect, use, and protect your personal data when you use our application.
For any questions regarding this policy, you can contact us at: contact@sudokuarena.online
Article 02 — Data We Collect
We collect only the data necessary to operate the service. The table below summarizes what we collect, why, and how long we keep it:
| Data | Purpose | Retention |
|---|---|---|
| Email address | Account creation, password reset, communications | Account duration + 1 year |
| Username | In-game display, leaderboards | Account duration |
| Game statistics | Progress tracking, leaderboard ranking | Account duration |
| Session cookies | Authentication, session management | Session or 30 days |
| Device & browser info | Compatibility, error diagnosis | 90 days |
We do not collect payment data, sensitive personal data, or any information beyond what is listed above.
Article 03 — How We Use Your Data
- Creating and managing your account
- Running the game and displaying leaderboards
- Sending transactional emails (password reset, account notifications)
- Diagnosing technical errors and improving the service
- Complying with our legal obligations
Article 04 — Legal Basis for Processing
- Contract performance — account management, game operation
- Legitimate interest — service improvement, security, error diagnosis
- Legal obligation — compliance with applicable regulations
- Consent — optional communications such as newsletters (where applicable)
Article 05 — Sharing Your Data
We do not sell, rent, or trade your personal data. We may share limited data with trusted service providers strictly for operating the service.
Article 06 — Your Rights
If you are located in the European Union or European Economic Area, you have the rights of access, rectification, erasure, portability, objection, and restriction. To exercise any of these rights, contact us at contact@sudokuarena.online.
Article 07 — Contact
For any questions, requests, or concerns regarding this Privacy Policy or the handling of your personal data, please contact us at contact@sudokuarena.online.