the author of this app says:
Classic sudoku puzzle. Features include:
1. Unlimited sudoku puzzles at 3 difficulty levels;
2. Sudoku solver;
3. Numeric and symbolic version of the puzzle;
4. Random and asymmetrically version of the puzzle;
5. Support touch screen;
6. Save games;
7. Save your bests;
8. Game clock.
If you like Sudoku, this is app for you!