Sumoku Killer & Classic Sudoku

Sumoku isn't just another sudoku. It's the Killer Sudoku that teaches you how to play — and makes you better with every grid.

Most sudoku apps just hand you the answer when you're stuck. Sumoku explains the reasoning: which technique to use, why this cell, how to break down a cage's sum. You stop guessing and start understanding.

▍ TWO MODES, ONE JOURNEY
- Killer Sudoku — add up the cages, deduce the digits, master sum combinations.
- Classic Sudoku — the timeless classic, from easy to expert.

▍ LEARN, THEN PLAY
Guided step-by-step lessons teach you every technique — from scanning to naked pairs and cage combinations — on real interactive grids.

▍ HINTS THAT TEACH
Our hints don't write the number for you. They name the technique and show you the logic. Out of hints? Earn a bonus one by watching a short video — your choice, never forced.

▍ DAILY CHALLENGE & STREAKS
A fresh grid every day, a calendar to track your collection, and missed days you can replay. Keep your streak alive and watch your consistency grow.

▍ BUILT FOR REAL PROGRESS
- 4 levels: Easy, Medium, Hard, Expert.
- Detailed stats: best times, average times, completion rate, streaks.
- Achievements that reward mastery, not luck.

▍ DESIGNED FOR COMFORT
- Notes, undo, erase, auto-highlight.
- Light, Dark and AMOLED themes.
- Fully playable offline, anywhere.
- Available in 12 languages: English, French, German, Spanish, Italian, Portuguese, Dutch, Polish, Turkish, Indonesian, Japanese and Korean.

▍ NO PRESSURE
No ads forced on every tap. A one-time "remove ads" option if you want total quiet.

Whether you're discovering Killer Sudoku or pushing toward expert, Sumoku is with you, grid after grid.

Download Sumoku and start improving today.

Recent changes:
• New input mode: pick a digit first, then tap the cells (Settings → Gameplay).
• Auto notes: fill empty cells with their candidates, pruned as you play.
• Challenge a friend: share any puzzle as a code they can open in Sumoku.
• Optional 3-mistake mode with a second chance, monthly daily trophies, and a hideable timer.