The free app of the day on Amazon is Sudoku 10’ooo Plus. I love Sudoku. This has great reviews.
Score this here—- free Sudoku 10’ooo Plus Android App
Information:
Expert Sudoku with 15’000 puzzles in eight different variants and in eight difficulty levels.
(1) Game Play
* Eight different Sudoku variants: Classic & Jigsaw puzzles (aka Squiggly), Asterisk-, Centerdot-, Color-, Hyper-, Percent- & X-Sudokus
* Eight difficulty levels: very easy, easy, moderate, advanced, hard, very hard, fiendish, nightmare
* Five input methods (digit first, cell first, mixed, Andoku, popup)
* Pencil marks with auto set or auto erase
* Persistent undo/redo
* Auto save
* Bookmarks
* Highlighting of selected digits and pencil marks
* Highlighting of completed digits
* Highlighting of incorrect digits
* Coloring mode (cells and pencil marks) to support coloring solving techniques
* Very advanced hint functionality
* Analysis functionality to rate the difficulty of a Sudoku puzzle and to get a detailed list of required solving techniques
* Game statistics: fastest, average, slowest times for each difficulty level
* Extremely configurable(2) Additional Features
* Sudoku Editor: create your own Sudoku puzzle from scratch
* Sudoku Importer: import Sudoku puzzles in five different formats: *.sdk, *.sdm, *.adk, *.opensudoku, *.1gsudoku. All *.adk formats are supported including jigsaw/squiggly puzzles with extra regions.
* Sudoku Generator: generate new Sudoku puzzles in eight difficulty levels
* Sudoku Solver: solve any Sudoku in milliseconds
* Sudoku Manager: create, delete, rename folders, create, copy, move, delete Sudokus, filter Sudokus according to their game status, difficulty and type
* Sudoku Widget: gives access to the start screen functions from your home screen(3) Supports
* Left-handed players (landscape mode)
* Portrait and landspace mode
* All screen types and sizes
* Touch screen, keyboard and trackball
* Installation on external storage (e.g. sdcard)
* Android 1.6-4.x
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