Sudoku World - Brainstorming!!

Sudoku World is a game app for iOS devices that offers unlimited Sudoku puzzles, generated randomly to ensure variety. It includes multiple Sudoku types such as X, Super, Jigsaw, 16x16, and Samurai, and a multiplayer mode for challenging friends online. Game Center is supported with 25 leaderboards and 20 achievements, and five difficulty levels are available. The app also features save/load options, statistics, pause/resume, undo/redo, and a smart note function.