Sudoku 4x4 is a brain puzzle game available on the iPhone platform. The objective is to fill the grid with numbers 1 to 4 in each row, column, and square to win the game. With millions of puzzles at different difficulty levels, players can enjoy endless challenges. The game offers features like undo, highscores, achievements for global comparison, a simple and clean interface, and the ability to save/load unfinished games.

Sudoku 4x4 provides a stimulating experience for puzzle enthusiasts, offering a wide variety of puzzles to solve and compete with others worldwide. Its user-friendly interface and features like undo and save/load functionality enhance the gaming experience, making it an engaging choice for fans of brain-teasing games.