Sudoku Focus: Classic Puzzles

Sudoku Focus is a free classic Sudoku puzzle game: play 9x9 number puzzles offline, train your brain with a new daily challenge, and learn the logic behind every move.

FOUR SUDOKU MODES
• Classic 9×9 — the traditional Sudoku grid
• 6×6 — a shorter puzzle for a five-minute break
• Killer Sudoku — cages and sums for a harder logic workout
• 16×16 — a large grid when you want a real expert challenge

SIX DIFFICULTY LEVELS
Quick, Easy, Medium, Hard, Expert and Master. Start with an easy Sudoku warm-up and climb to Master when you are ready.

A NEW PUZZLE EVERY DAY
Daily Challenge gives you Light, Standard and Challenge puzzles every day, and Daily Trio marks the day complete when you finish all three. Missed a day? Choose any date and catch up — each mode keeps the same puzzle for that day, so you and your friends solve exactly the same board.

HINTS THAT TEACH, NOT JUST SOLVE
A 3-step Hint shows you where to look, then the logic that forces the number, and only then the answer. Technique Academy goes further: learn a real solving technique, then use it on a live board. Mastery only goes up when you find the move yourself.

TOOLS THAT KEEP THE BOARD CLEAR
Notes for pencil marks, Undo, Erase, mistake checking, Pause, related-cell highlighting and number-first input. Your game saves automatically, so you can close the app mid-puzzle and come back to the exact same board.

TRACK HOW YOU IMPROVE
Best times by mode and difficulty, Day streak, mistakes and hints used, plus weekly Daily Growth goals like Classic Sprint, Mode Explorer and Difficulty Climber.

PLAY WITH FRIENDS
Send a Friend Challenge code and see who solves the same puzzle faster. The code works offline and never contains the solution. Sign in with Google if you want cloud sync across devices and Ranked Daily, where one puzzle per day is timed the same way for everyone.

PLAY OFFLINE, ANYWHERE
Classic puzzles, Daily puzzles and Friend Challenges all work with no internet connection — good for a commute, a flight, or anywhere with no wifi.

MADE TO BE EASY ON THE EYES
A clean, readable board with large numbers, Dark mode, and an optional Daily reminder when you want to keep your streak going.

Whether you want a five-minute reset or a serious logic workout, Sudoku Focus keeps every puzzle clear, calm and rewarding. Start your first Sudoku puzzle now.