Your daily puzzle page

8 variants.
No ads.
No rush.

An ad-free sudoku app with eight puzzle variants and a new daily challenge. Solve at your own pace, anytime, even offline.

Download on theApp StoreComing soonGoogle Play

The Sudoku Journal mascot, a smiling sudoku journal holding up a pencil
Sudoku JournalREADY OFFLINE
Daily challengeThursday · Classic · Medium
12:48Time
0Hints used
12Day streak
100% ad-free
Works offline
New puzzle daily
Free to download
Tools for solving

Solve without interruptions.

100% ad-free

Every puzzle, every day, is ad-free. Pop-ups and forced videos do not interrupt your solve.

Works offline

Solve offline on flights, underground, or anywhere without a signal.

A new daily challenge

A fresh puzzle is available every day.

8 puzzle variants, every difficulty

Play Classic, Jigsaw, Diagonal, Killer, Thermometer, Sandwich, Odd/Even, and Windoku at easy, medium, hard, or expert difficulty.

Smart notes

Use pencil marks to keep track of possible digits in each cell.

Free hints and mistake checking

Hints can guide you to the next move or reveal a correct digit. Mistake checking flags incorrect entries.

Why Sudoku Journal

Sudoku, the way it used to feel.

Sudoku Journal keeps ads out of your puzzles, including the free ones.

Solve at your own pace. The timer records elapsed time; it does not set a time limit.

Common interruptionsSudoku Journal
Advertising during playNo ads, ever
A video to unlock a hintHints are free and unlimited
Pop-ups between puzzlesNo advertising between puzzles

Eight variants, one familiar layout.

Every variant uses the same controls and board layout, so you can focus on its rules.

Classic Sudoku

Classic Sudoku is available in full 9×9 and quick 6×6 boards.

Jigsaw Sudoku

Jigsaw Sudoku uses irregular regions instead of boxes in both 9×9 and 6×6 boards.

Diagonal Sudoku

Each diagonal must contain digits 1–9.

Killer Sudoku

Digits in each cage must add up to its total without repeating.

Thermometer Sudoku

Numbers must increase as they climb along each thermometer.

Sandwich Sudoku

Clues give the sum of the digits between 1 and 9 in a row or column.

Odd/Even Sudoku

Marked cells contain odd or even numbers.

Windoku

Four extra shaded regions also need to contain every digit 1–9.

Classic and Jigsaw come in both 9×9 and 6×6. The other six variants are 9×9.

Screens and steps

See it in action.

Five screens show a puzzle in progress, the rules menu, pencil marks, a completed Daily Challenge, and a hint.

One board, five moments
Classic Sudoku puzzle in progress with a selected cell and player-entered digit
A puzzle in progressEntered digits are blue, givens are black, and the selected cell is highlighted.
How to Play menu listing all eight Sudoku Journal puzzle variants
The rules menuChoose a variant to read its rules and suggested first moves.
Classic Sudoku board with pencil marks in two cells and Notes mode selected
Pencil marks in useUse pencil marks for possible digits. Clear the notes when you know which digit fits.
Sudoku Journal home showing a solved Daily Challenge and one-day streak
The daily streakA fresh puzzle is available every day to add to your daily streak.
Guided hint asking the player to find a digit with one valid position in box 6
A hint, explainedThis hint asks you to find a digit with only one possible position in a box.

Actual in-app screens captured on iPhone.

Completed Daily Challenges are recorded in your journal.

Pick a variant

Choose from 8 sudoku variants and a difficulty that fits your mood.

Solve at your pace

Use notes and free hints whenever you need them.

Build your streak

Come back daily for a fresh challenge.

Free vs Unlimited

Free to play. Upgrade for unlimited puzzles.

The free app includes 14 puzzles a week across every variant, with no advertising. A one-time unlock removes the weekly limit.

FreeNo account needed
14free puzzles a week
  • 14 free puzzles a week, across all 8 variants
  • Free hints and mistake checking
  • Offline play
  • No ads
UnlimitedOne-time purchase
∞puzzles, every day
  • Unlimited puzzles, every day
  • Full access to all 8 variants, anytime
  • Everything in Free, without the weekly limit

Both options are ad-free, with no subscription. The price is shown before you confirm an in-app purchase.

Start free →
A note from the maker

“A puzzle is already enough.

We built Sudoku Journal because ads were the most frustrating part of other sudoku apps. Here, you can open a puzzle, settle in, and solve at your own pace — without banners, video interruptions, or anything competing for your attention.”

Questions / Answers

Questions and answers.

Read about access, offline play, the Daily Challenge, and your journal.

Is Sudoku Journal really free?

Yes. The app is free to download and includes 14 puzzles a week across all eight variants. A one-time in-app purchase unlocks unlimited puzzles.

Are there ads or subscriptions?

No. There are no ads and no subscription.

Can I play offline?

Yes. Your puzzles are available without an internet connection.

What is the Daily Challenge?

A new Daily Challenge is free each day and does not use your weekly quota. Completed challenges appear in your journal and count toward your streak.

How does Sudoku Journal work?

Pick one of eight sudoku variants and a difficulty, then solve at your pace. Your journal records play history, completed Daily Challenges, and your daily streak.

Which eight puzzle variants are included?

Classic Sudoku, Killer, Diagonal, Jigsaw, Sandwich, Odd/Even, Thermometer, and Windoku.

The next page is yours

Your next puzzle
is waiting.

Begin with today’s challenge or choose one of eight sudoku variants. Every solved board becomes another page in your journal.

Download on theApp StoreComing soonGoogle Play