Sudoku

Sudoku, done properly.

400 puzzles across four difficulty levels — 100 each in Easy, Medium, Hard
and Expert. Every one has exactly one solution, verified before it ever
reached your phone.

REAL DIFFICULTY, NOT JUST FEWER NUMBERS

Most Sudoku apps set difficulty by removing more digits. That is not the
same thing. Here, every puzzle is graded by the hardest technique actually
needed to solve it:

• Easy — solvable with simple scanning alone
• Medium — needs hidden singles
• Hard — needs locked candidates and pairs
• Expert — needs deeper reasoning and real patience

So an Easy puzzle is genuinely gentle, and an Expert puzzle genuinely
earns the name.

BUILT FOR ACTUAL SOLVING

• Pencil marks — jot candidates in any cell, cleared automatically when
you place the digit that rules them out
• Unlimited undo
• Highlighting that does the tedious work: your selected cell, its row,
column and box, and every other cell holding the same digit
• Mistake check whenever you want it — never forced on you
• Hints when a puzzle will not budge
• A timer that pauses when you leave, so your solve time stays honest

PLAYS ANYWHERE

No account. No sign-up. No internet needed to play a single puzzle.
Everything is stored on your device, and your progress is saved
automatically — close the app mid-puzzle and pick it up exactly where you
left it, pencil marks and all.

MADE TO LIVE WITH

• Light and dark themes
• Six languages: English, Arabic, German, French, Spanish, Italian
• Six background music tracks, or none at all
• Sound effects and vibration, both optional
• Optional reminders if you like a daily puzzle habit
• Readable at large accessibility text sizes

Free to play, supported by ads. A single one-time purchase removes them
permanently if you would rather play without.

Intended for players aged 13 and over.