Sudoku 4ever

1gravity LLC

Contains ads

About this game

Unlimited number of puzzles, eight difficulty levels, world-class hint engine and game statistics - simply the best Sudoku app on the market.


••••• 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 and total time played for each difficulty level
★ Extremely configurable
★ The integrated solver solves any Sudoku in milliseconds


••••• Supports •••••

✔ Portrait and landscape mode
✔ All screen types and sizes
✔ Touch screen, keyboard and trackball
✔ Installation on external storage (e.g. sdcard)
✔ Android 1.6-4.x


••••• 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 supported by unobtrusive ads

Ratings and reviews

One GREAT feature this app has over every other sudoku app I've tried is the ability to select a number FIRST and then put that number into multiple squares (instead of being stuck working one square at a time). My only complaint about this app is the difficulty spike from Hard to Expert. Hard uses only X-Wing, but not XYZ-Wing or XY-Wing. Expert has those but also has things like WXYZ-Wing which only a computer can solve. A difficulty in between those two would make this app perfect.

I've played this game for years. What I love about it, it is truly free and practically no ads. I love the ease of use, yet it is possible to adapt to your liking, change of any part of the grid, font, help, you name it. Not so fond of the night mode, but that's the only (little) gripe. Spent soo many hours.

Needs setting to stop autoplay of ads or always mute them. I like to play sometimes when I can't sleep, and the intrusive noise is extremely annoying to people around me. If I uninstall, it will be because of this alone.

What's new

- The font size for hints was too small on newer devices, this is fixed
- Numerous bug fixes and improvements