Sudoku9!

The worlds best Sudoku game for iPhone/iPad. It provides ease of use and almost every feature you can imagine. - Game Center integrationCheck worldwide rankings, the best time ranking in each levelsBackup best time and total score to Game Center- Various settings Sound Effects On / Off, change the language, etc.- Feedback functionYou can report a bug or your opinion, and are able to communicate with the developer.- iOS8 support- iPhone 6, iPhone 6 Plus support- World ranking page