Hi, how can we help you?

What are the Sudoku rules?

What types of unique rectangles are there in Sudoku?

How do I begin a new game or restart my current game?

iOS: My cumulative score disappeared! How do I restore it?

Android: Can I transfer my Sudoku data to a new device?

Android: My Sudoku Scores and Achievements have disappeared! How do I restore it?

iOS: Why is my game closing unexpectedly?

Android: Why is my game is freezing/ closing unexpectedly?

iOS: Why is my game frozen?

Why do I still see ads after purchasing the paid version of the game on my Android device?

If I pay to remove ads from Sudoku, will my scores carry over on my iOS device?

How do I remove ads from my game?

How do I turn off in-game sound?

iOS: Why is the ad volume so loud?

Android: Why is the ad audio so loud?

NOVEMBER 2025 - Sudoku Restore Purchase Bug

Android: I paid to remove ads, so why am I still seeing ads in my game?

iOS: I paid to remove ads in Sudoku and I am still seeing ads

Where can I find Brainium’s Privacy Policy?

I would like to Opt Out / Request Data Deletion

What is a Daily Puzzle and what does the calendar indicate?

Android: Why isn't my Daily Puzzle syncing?

iOS: My Achievements, Scores, Daily Game, or Game Center are not working!