Hummus Sudoku Quick Solver solves Sudoku puzzles quickly, as it name suggests.
Once the puzzle is solved you can create a PDF document form the board appearance to show your friends how wonderful you are in resolving Sudoku Puzzle.
This app is implemented to show how one can create PDF files using the performance oriented PDF library which goes by the name of PDFHummus. more details about this implementation in http://pdfhummus.com/how-to-build-iphone-apps-that-use-pdfhummus