Sudoku-数独-无广告 app for iPhone and iPad

A Sudoku game that both adults and children like, there are four levels of difficulty: Easy, Normal, Hard, and Challenging, with a total of 124 puzzles. In addition, you can create your own puzzles without limit.
This App has no advertisements, you can concentrate on it without being disturbed.
Before in-app purchase, all functions can be used, but the number of puzzles is limited.

Key features include:
1 Mark function:
Markers are used to aid memory and exclude impossible numbers.

2 Tips function
When the single step button is clicked, the app will automatically fill in a number.
When the prompt switch is turned on, the app will automatically exclude numbers that are not allowed by the basic rules.

3 App problem solving demonstration function
You can watch the problem solving steps of the App step by step.

4 Create your own questions
You can create any number of Sudoku puzzles


In addition, the App provides other settings such as sound effects, and more importantly, you can change the background color to your liking.