NP World description

You plus this app is good.
This is Sudoku (Number Place) app and can enjoy 25000 puzzles free.
This app will satisfy it from a beginner to an expert with the high quality puzzle of 5 difficulty levels.

Key features:
- 2 input modes
- Pencil marks with auto fill / erase
- Auto save
- Undo and Redo
- Selected digit highlighting
- Incorrect entry highlighting
- Completed digit highlighting