Handwriting
Draw a digit in the cell and the app reads it on your phone, with no connection needed after a one-time download. Grids larger than 9×9 accept letters as well.
39
Really great sudoku.
Sudoku Workshop gives you a clean board and lets you set it up the way you like to solve. You can write digits by hand, keep pencil marks exactly where you put them, and choose from 21 color palettes.
3ways to write a digit
21color palettes
7grid sizes
1free puzzle, every day
5
3
4
6
7
28
28
6
7
2
1
9
5
1
9
8
23
34
24
6
8
5
19
79
6
3
4
2
69
8
5
3
59
1
7
1
59
2
14
6
6
35
7
2
8
4
23
8
4
1
9
36
3
5
23
14
8
26
7
9
Inputs
Write digits the way you would on paper.
Handwriting sits alongside two faster ways to enter a digit, and you can switch between all three from the board while you play.
Keypad
Tapping a cell opens a small keypad right beside it, close to where your thumb already is.
Digit palette
Choose a digit once and then tap each cell it belongs in, which makes filling in every 7 on the board quick work.
Pencil marks
Notes work with whichever input method you use. Each candidate has a fixed position in the cell, so the marks stay where you expect them as others are erased.
Make it yours
21 palettes, tuned by people who stare at screens for a living.
The palettes come from editor themes that programmers rely on through long working days, and on Android 12 or later the app can match your wallpaper instead. Tap one to try it on this page. The settings below decide how much help the board gives you.
Timer
Show a running clock while you solve, or hide it for a slower game.
On by defaultHighlight the neighborhood
Tint the row, column and box around the selected cell.
On by defaultShade what a digit rules out
Tap a digit above the board to see everything it eliminates.
Off by defaultClear notes for me
Remove a placed digit from the pencil marks around it automatically. Plenty of solvers prefer to do this themselves.
Off by default
Also on the bench
The rest of the workshop.
Seven sizes
Puzzles come in 4×4, 6×6, 8×8, 9×9, 12×12, 16×16 and 25×25, so there’s something for a short break and something for a long weekend.
Variants
X-Sudoku adds both diagonals as extra constraints, and Hyper adds four inset regions. Each one appears only on grid sizes where it makes a fair puzzle.
Reliable difficulty
Each puzzle is rated by the techniques it requires, across five tiers from Very Easy to Expert.
At home on foldables
The board fills the largest square the screen allows, whether your phone is folded, unfolded or turned sideways, and you can pinch to zoom at any grid size.
Check your progress as you go
The row of digits above the grid marks each number once you’ve placed all of them, and tapping one highlights everywhere it already appears.
Automatic saving
Every puzzle saves as you go, and the main menu offers to pick up where you left off. You can turn that off if you’d rather start fresh.
The daily
A free puzzle every day.
The daily is a classic 9×9 that everyone gets on the same day, which makes it easy to compare notes with friends. All five difficulty levels are free, and the calendar records which ones you’ve finished.
- An optional daily reminder that stays quiet once you’ve solved the puzzle
- A calendar that fills in as you complete each day
- Past dailies are available with Unlimited
September 202642 solved
?
7
7
7
7
Where does the 7 go in the top-left box?
Training
Learn the techniques behind the puzzles.
Training covers eleven techniques, from hidden singles to alternating inference chains. The first examples of each are reduced to only the clues the deduction needs, sometimes as few as four, which makes the pattern easy to see. After that you practice on full boards where the technique you’re learning is the only move available.
- Naked singleEasy
- Hidden singleEasy
- PointingMedium
- ClaimingMedium
- Naked subsetHard
- Hidden subsetHard
- X-WingExpert
- Y-WingExpert
- SkyscraperExpert
- Two-String KiteExpert
- Alternating inference chainExpert
Pricing
Play free every day, or unlock everything.
Today’s puzzle is free for everyone. A single unlock, paid monthly or once, opens up the rest of the app.
Free
$0
Free for everyone, with no time limit.
- Today’s daily, at all five difficulties
- Every theme and input method
- Calendar and daily reminder
Unlimited MONTHLY
$1.99 / month
Cancel any time in Google Play.
- Everything in Free
- Unlimited new puzzles at every size, difficulty and variant
- The full archive of past dailies
- The board editor, for entering puzzles from anywhere
Lifetime
$14.99 once
The same unlock as the monthly plan, with a single payment.
- Everything in Unlimited, permanently
- Tied to your Google account, so it moves with you to a new phone