Sudoku 10'000 Free is an Android app developed by 1gravity that offers a complete Sudoku experience. The app has 15,000 puzzles and eight difficulty levels, making it the only Sudoku app you'll ever need. It supports eight different Sudoku variants, including Classic and Jigsaw puzzles, as well as Asterisk, Centerdot, Color, Hyper, Percent, and X-Sudokus. The app provides six input methods, including digit first, cell first, and mixed.

The app also features pencil marks with auto set or auto erase, persistent undo/redo, auto-save, bookmarks, highlighting of selected digits and pencil marks, and highlighting of completed and incorrect digits. The app's coloring mode supports coloring solving techniques. The hint functionality is very advanced, and the analysis functionality rates the difficulty of a Sudoku puzzle and provides a detailed list of required solving techniques. The app also offers game statistics for each difficulty level.