The sudoku free for windows is more friendly..... until this moment
sudokuki is more friendly in the memo option because when you go to insert a number you select the mode.
But in both cases not are very fast.
The notes or memo option and the automatic recognition of a number used is very friendly in the sudoku free.
![tongue :P](https://www.donationcoder.com/forum/Smileys/fun/tongue.gif)