Sudoku Classic is a puzzle game that offers over 60,000 puzzles for free and offline. With six different levels of difficulty, players can relax or keep their minds active in a pleasant way. The game also features additional helper functions, statistics to track progress and achievements, and leaderboards to conquer. The app is optimized for smartphones and tablets and includes a night mode theme.

The game offers a wide range of features, including an auto-solver, notes as on paper, eraser for getting rid of all mistakes, and an undo option for reverting mistakes or accidental moves. Additionally, the app allows players to save and continue the game whenever they want. The optional helper functions include highlighting of row, column, and box of the conflicted entered numbers, highlighting of all fields which have the same value as the currently selected input button, and additional random hints per game.

Overall, Sudoku Classic is a great option for those who enjoy logic puzzles. With its easy-to-use interface, players can enjoy the game anywhere and anytime without an internet connection.