Sudoku Multi, developed by GrandGames.net, is a free puzzle game for Android that offers a collection of Sudoku puzzles of various types. The program has a user-friendly solution interface with highlighting and automatic substitution of candidates to help solve the puzzles.

In addition to the classic 9x9 cell puzzles, Sudoku Multi offers a variety of other puzzle types, including Butterfly, Flower, Cross, Samurai, and Sohei. The app allows users to save their progress and undo moves, making it easy to pick up where they left off. Whether you're a seasoned Sudoku player or just starting, Sudoku Multi has something for everyone.