About this app

15'000 puzzles, eight difficulty levels, the world's best hint functionality and statistics. The only Sudoku app you'll ever need!


••••• 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
★ Six input methods (digit first, cell first, mixed, Andoku cell first, Andoku digit first, 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


••••• 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. Supports all *.adk formats 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 and puzzles, filter by game status, difficulty and type
★ Synchronization of games and settings across multiple devices


••••• Supports •••••

✔ Left-handed players (landscape)
✔ Portrait and landscape mode
✔ All screen types and sizes
✔ Touch screen, keyboard and trackball
✔ Installation on external storage (e.g. sdcard)
✔ Android 1.6-6.x + Android N


••••• Hint Functionality •••••

★ Full House
★ Hidden Single
★ Hidden Subset (Pair, Triple + Quad)
★ Naked Single
★ Naked Subset (Pair, Triple + Quad)
★ Locked Candidates (Pointing + Claiming)
★ X-Wing (Regular, Finned + Sashimi)
★ Swordfish (Regular, Finned + Sashimi)
★ Jellyfish (Regular, Finned + Sashimi)
★ XY-, XYZ-, WXYZ-, VWXYZ-, UVWXYZ-, TUVWXYZ-, STUVWXYZ-, RSTUVWXYZ-Wing
★ W-Wing
★ Almost Locked Candidates (Pair, Triple + Quad)
★ Avoidable Rectangle (type 1 + 2)
★ Hidden Unique Rectangle
★ Uniqueness Test (type 1, 2, 3, 4 + 5)
★ BUG+1, BUG+2, BUG+3 and BUG+4
★ Aligned Pair + Triple Exclusion
★ Sue de Coq
★ ALS-XZ, ALS-XY-Wing
★ Remote Pairs
★ Bidirectional Cycles
★ Forcing X-Chains
★ Forcing XY-Chains
★ Nishio Forcing Chains
★ Double Forcing Chains
★ Contradiction Forcing Chains
★ Region Forcing Chains
★ Cell Forcing Chains

If you like the game, don't forget to rate it!

The free version is ad supported

New features

- New function to eliminate all singles (full house, naked & hidden single)
- All assistance functions are now grouped in a sub menu to declutter the main menu

App Permissions

Allows access to the vibrator.
Allows applications to open network sockets.
Allows applications to access information about networks.
Allows an application to modify the current configuration, such as locale.
Allows applications to disable the keyguard if it is not secure.
Allows using PowerManager WakeLocks to keep processor from sleeping or screen from dimming.
Allows an application to write to external storage.
Allows an application to read from external storage.