Sudoku - Classic Number Puzzle

A calm, classic Sudoku — clean board, no clutter, just the puzzle.

Sudoku: Classic Number Puzzle is a traditional 9x9 number puzzle game built for people who actually want to solve sudoku, not fight their way through pop-ups. No timers you didn't ask for, no forced ads between puzzles, no noisy interface. Just a beautiful board and a puzzle worth your time.

Every puzzle has exactly one solution and can be solved by logic alone. No guessing, ever.

SEVEN DIFFICULTY TIERS
Climb a real ladder, from your first puzzle to your hardest:
- Beginner — learn the rules at your own pace
- Apprentice — build the scanning habit
- Solver — where sudoku starts to feel good
- Strategist — you'll need pencil marks here
- Expert — for confident solvers
- Master — genuinely hard puzzles
- Legend — the last 22 clues will not go quietly

Each tier unlocks by winning the one below it, so the difficulty always meets you where you actually are.

CHALLENGE A FRIEND
Playing something good? Send the exact same puzzle to a friend — same grid, same clues — and settle who solves it faster. Share it through WhatsApp, email, Facebook, or just copy the link. The whole puzzle travels inside the link itself, so there's no sign-up, no account, and nothing stored online. They open it, they play your puzzle, you compare times.

HINTS THAT TEACH YOU SOMETHING
Most sudoku apps just fill in a square when you're stuck. This one points you at a square you can genuinely work out next and explains the reasoning — which row, column, or box eliminates everything else. You'll actually get better. If you'd rather just see the answer, Reveal is one tap away.

A DAILY PUZZLE AND A REASON TO COME BACK
- One Daily Challenge every day, the same puzzle for every player
- Day streaks, with streak freezes that quietly cover a missed day
- Three fresh challenges daily, plus one that runs all week
- Achievements for fast solves, clean rounds, and long streaks

EIGHT HANDCRAFTED THEMES
Classic and Dark are free from the start. Then there's Vintage Gold, Emerald, Blossom, Cosmos, Beach and Mountains — scenic boards drawn entirely in code, so they add nothing to the download size and stay perfectly readable while you solve. Earn them through challenges, or try one for an hour.

EVERYTHING ELSE YOU'D EXPECT
- Pencil marks (notes) — jot candidates exactly like you would on paper
- Erase a square you're unsure of, free of charge
- Restart the grid without losing your place in the tier
- Practice mode with a stopwatch, or Timed mode with a countdown
- Three mistakes per puzzle, so it still matters
- Best times tracked per difficulty
- Auto-save — close the app mid-puzzle and pick it up exactly where you left off

PLAYS OFFLINE
On a plane, on the train, in a waiting room with no signal — the whole game works with no internet connection at all. Nothing to download mid-game, nothing to wait for.

NO ACCOUNT NEEDED

No sign-up, no login, no email. Your stats and progress live on your device.

Free to play. Optional rewarded videos are there if you want an extra hint or another shot at a puzzle — never forced, never between rounds.

Whether you're learning sudoku for the first time or you've been solving for thirty years, there's a tier here that will make you think.

Download Sudoku: Classic Number Puzzle and get back to the puzzle.