Kaizen Sudoku › Help & frequently asked questions
Help & frequently asked questions
Can't find your answer? Write to us at sudokukaizen@gmail.com.
Is Kaizen Sudoku really free?
Yes. Every puzzle, all difficulty levels, the daily challenge and statistics are free, and there are no ads. Optional one-time purchases add themes, unlimited hints or credits; there are no subscriptions.
Are there any ads?
No. Kaizen Sudoku has no ads of any kind: no banners, no videos and no ads for hints.
How do hints work?
You get 3 free hints in every game. A hint first corrects a wrong number if there is one; otherwise it fills in the next cell that can be found by logic. When the free hints are used up, you can pay 250 points or 1 credit per hint. Lifetime Premium makes hints unlimited.
How do I earn points?
You earn points every time you complete a puzzle. Harder levels, faster times and solving without mistakes or hints give more points. Points buy extra hints (250) or one extra mistake per game at the mistake limit (500).
What are credits?
Credits are an optional purchase in packs of 50 or 100. Each credit can be used as 1 hint or 1 continue (+1 mistake) when you reach the mistake limit. Credits never expire.
What is the difference between All Themes and Lifetime Premium?
All Themes unlocks every premium theme, including future ones. Lifetime Premium includes all themes too, and adds unlimited hints and unlimited continues at the mistake limit. Both are one-time purchases.
How do I restore my purchases on a new device?
Sign in with the same Apple ID or Google account, open Settings › Premium and tap Restore purchases. Themes and Lifetime Premium are restored. Credits are consumed when used and are not restored.
Can I play offline?
Yes. Puzzles are generated on your device, so you can play and continue saved games without a connection. Purchases and leaderboards need a connection.
Can I turn off the mistake limit or the timer?
Yes. In Settings you can set the mistake limit from 1 to 5 or switch it off, hide the timer, and choose whether mistakes and matching numbers are highlighted.
Which languages does the app support?
English, Turkish, German, French, Spanish, Portuguese (Brazil), Italian, Japanese, Simplified Chinese, Korean and Russian. You can change the language in Settings.
How do I reset my statistics?
Open Settings › Data › Reset progress. This clears statistics and points. Purchased credits and purchases are not affected.
How do I contact support?
Email sudokukaizen@gmail.com. Please include your device model and app version (Settings › About).