The Best, Really!
I played lots of Sudoku when looking for the best App; This is it. Sudoku Joy has everything: training for beginners, lots of defined difficulty levels so you can improve but not get too frustrated, hints and help if you need it, including undo and undo until solvable!, more puzzles whenever you want more than the new daily set. You can even upload your own puzzles with a photo, so you can do the sudoku from the paper or wherever, but still have all of the Apps hints and undo features (No more leaving a half done puzzle when you cant figure out your error!).
This IS the best Sudoku App. Look no further!
ASU82 about
Sudoku Joy, v5.2.4