You don't need internet to play.
No ads are shown in the game.
You can change the size of the text in the game.
The number of empty boxes in Sudoku can be set from 5 to 72. Thus, the difficulty level can be determined for children or masters.
You can write the numbers that can come in the boxes as a note in the box.
You can open the boxes you can't find with as many hints as you want. Boxes opened with a hint are counted.
Incorrect entries are counted.
You can pause the game so that the elapsed time will also stop.
When you close the game and open it, you can continue from where you left off.