Support
Need help with Sudoku Royale? Check the common questions below or reach out to us directly.
Contact us
Email support@sudoku-royale.com and we will get back to you within a few days.
Frequently asked questions
How do I delete my account?
Send an email to support@sudoku-royale.com with the subject line "Delete my account". Include the username shown in your profile so we can find your account. We will delete all your data within 30 days.
What can I play?
Most of Sudoku Royale is solo: a fresh Daily Challenge every day, unlimited Practice from Easy to Expert with no timer, and Dojo drills that train one technique at a time. Live matches are optional. In Battle Royale, 2 to 18 players race on one shared grid for a single round and the most cells claimed wins. Tournament runs several rounds and cuts the lowest scorers each round until one solver is left. In Duel, two players go head to head in a single round. If not enough players join a live match, bots fill the remaining seats after a short wait.
How is my rating calculated?
Your skill rating starts at 1000 and adjusts after each ranked live match. It is based on the Glicko-2 system, a proven rating system also used by Lichess and other competitive platforms. It factors in your finish position, the ratings of your opponents, and how confident the system is in your current rating. Winning against higher-rated players earns more points than winning against lower-rated players.
Do I need an email to play?
No. Accounts are created automatically using a random device identifier when you first open the app. No email, password, or sign-up form is required.
Can I play offline?
Yes, for solo play. Practice puzzles and Dojo drills work offline. Live matches and leaderboards need an internet connection.
Is the game free?
Yes. Sudoku Royale is free to play with no ads and no in-app purchases.
What data do you collect?
We collect the minimum needed to run the game: a device-generated account ID, your chosen username, gameplay stats, and an optional push notification token. We do not collect your email, location, contacts, or any data from other apps. See our Privacy Policy for full details.