Sudokoo (com.darshan.android.sudokoo) on Google Play
This is the number one Sudokoo app!You won’t be looking for a paper puzzle ever again as this app features of unlimited games to keep you engaged for as long as you can play! This sudoku app is sure to be among your favorites...The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid contains all of the digits from 1 to 9. Each puzzle has a partially completed grid, which typically has a unique solution.Features:* 3 levels - easy, medium, hard* Undo and Redo* Pencil marks* Auto-save and continue at a later time.* Intelligent hints* Top scores and History* Pause and Resume