Cozy sudoku. A little more lovely with every solve.

Classic sudoku along a hand-stitched journey. Every board you finish becomes a woven Tile to keep.

Every board you finish becomes a Tile.

The first squares you fill come out pale and the last ones deep, so each Tile is a small picture of how you solved it. No two weave the same way.

One thread through fifty chapters.

1,000 levels wind from First Stitches to Loomoku Heights, and every chapter has its own felt cloth.

  • Felt landscape for chapter 1, First Stitches

    First StitchesChapter 1

  • Felt landscape for chapter 2, Calico Morning

    Calico MorningChapter 2

  • Felt landscape for chapter 3, Linen Hills

    Linen HillsChapter 3

  • Felt landscape for chapter 4, Thimble Creek

    Thimble CreekChapter 4

  • Felt landscape for chapter 5, Patchwork Lane

    Patchwork LaneChapter 5

  • Felt landscape for chapter 6, Indigo Meadow

    Indigo MeadowChapter 6

  • Felt landscape for chapter 7, Spool Hollow

    Spool HollowChapter 7

  • Felt landscape for chapter 8, Gingham Orchard

    Gingham OrchardChapter 8

  • Felt landscape for chapter 9, Loom Valley

    Loom ValleyChapter 9

  • Felt landscape for chapter 10, Needle Point

    Needle PointChapter 10

  • Felt landscape for chapter 11, Clay Ridge

    Clay RidgeChapter 11

  • Felt landscape for chapter 12, Homespun Harbor

    Homespun HarborChapter 12

  • Felt landscape for chapter 13, Quilting Bee

    Quilting BeeChapter 13

  • Felt landscape for chapter 14, Flannel Woods

    Flannel WoodsChapter 14

  • Felt landscape for chapter 15, Cotton Bluff

    Cotton BluffChapter 15

  • Felt landscape for chapter 16, Nine Patch Falls

    Nine Patch FallsChapter 16

  • Felt landscape for chapter 17, Thread Lake

    Thread LakeChapter 17

  • Felt landscape for chapter 18, Muslin Marsh

    Muslin MarshChapter 18

  • Felt landscape for chapter 19, Bobbin Bay

    Bobbin BayChapter 19

  • Felt landscape for chapter 20, Sashing Crossroads

    Sashing CrossroadsChapter 20

  • Felt landscape for chapter 21, Ochre Terrace

    Ochre TerraceChapter 21

  • Felt landscape for chapter 22, Batting Hollow

    Batting HollowChapter 22

  • Felt landscape for chapter 23, Chambray Shore

    Chambray ShoreChapter 23

  • Felt landscape for chapter 24, Lattice Fields

    Lattice FieldsChapter 24

  • Felt landscape for chapter 25, Hemstitch Pass

    Hemstitch PassChapter 25

  • Felt landscape for chapter 26, Tapestry Rise

    Tapestry RiseChapter 26

  • Felt landscape for chapter 27, Fold Line

    Fold LineChapter 27

  • Felt landscape for chapter 28, Damask Delta

    Damask DeltaChapter 28

  • Felt landscape for chapter 29, Paper Mill

    Paper MillChapter 29

  • Felt landscape for chapter 30, Ink Well

    Ink WellChapter 30

  • Felt landscape for chapter 31, Selvedge Cliffs

    Selvedge CliffsChapter 31

  • Felt landscape for chapter 32, Crosshatch Canyon

    Crosshatch CanyonChapter 32

  • Felt landscape for chapter 33, Lantern Row

    Lantern RowChapter 33

  • Felt landscape for chapter 34, Warp and Weft

    Warp and WeftChapter 34

  • Felt landscape for chapter 35, Running Stitch

    Running StitchChapter 35

  • Felt landscape for chapter 36, Feather Pine

    Feather PineChapter 36

  • Felt landscape for chapter 37, Log Cabin Lake

    Log Cabin LakeChapter 37

  • Felt landscape for chapter 38, Flying Geese

    Flying GeeseChapter 38

  • Felt landscape for chapter 39, Star Point

    Star PointChapter 39

  • Felt landscape for chapter 40, Bear Paw Trail

    Bear Paw TrailChapter 40

  • Felt landscape for chapter 41, Drunkard's Path

    Drunkard's PathChapter 41

  • Felt landscape for chapter 42, Storm at Sea

    Storm at SeaChapter 42

  • Felt landscape for chapter 43, Grandmother's Garden

    Grandmother's GardenChapter 43

  • Felt landscape for chapter 44, Ocean Waves

    Ocean WavesChapter 44

  • Felt landscape for chapter 45, Broken Dishes

    Broken DishesChapter 45

  • Felt landscape for chapter 46, Pinwheel Summit

    Pinwheel SummitChapter 46

  • Felt landscape for chapter 47, Compass Rose

    Compass RoseChapter 47

  • Felt landscape for chapter 48, Double Wedding Ring

    Double Wedding RingChapter 48

  • Felt landscape for chapter 49, Cathedral Window

    Cathedral WindowChapter 49

  • Felt landscape for chapter 50, Loomoku Heights

    Loomoku HeightsChapter 50

A calm game, on purpose.

Hints that teach

A nudge first, then the technique by name, then the exact move. You decide how much help you want.

A sudoku board in Loomoku with a hint card explaining a Naked Single

Gentle mode

New to sudoku? Mistakes are marked but cost no lives, and every hint is free.

Slips are forgiven

Tap a digit that is already in the row and the square just shakes. No life lost.

Nothing to sign, nothing to buy

No account, no ads, no purchases. The app plays fully offline.

Notes, undo, locked digits

Pencil in candidates, undo all the way back, or hold a digit to place it again and again.

One puzzle a day. One Quilt a month.

The daily puzzle is the same for everyone who plays. Each one you solve stitches a Tile into the month.

A sample month. Twenty dailies earn the month badge.

From first stitches to fiendish.

Twelve grades in four tiers. The journey climbs slowly, and each new technique is explained the first time you meet it.

  1. GentleGrades 1 to 4

    Naked single, hidden single

  2. SteadyGrades 5 to 7

    Pointing and claiming, naked pair, hidden pair

  3. TrickyGrades 8 to 10

    Naked and hidden triples, X-Wing, XY-Wing

  4. FiendishGrades 11 and 12

    Swordfish, XYZ-Wing, simple coloring

Read about every technique

Try chapter one right here.

Twenty puzzles in your browser, with the same board, hints and Tiles as the app. Nothing to install, and no account.

Questions, answered

What is Loomoku?

Loomoku is a calm sudoku game for iPhone and iPad with a hand-stitched felt-and-linen look. You solve classic 9×9 sudoku along a journey of 1,000 levels in 50 chapters, play one shared daily puzzle, and keep a woven Tile for every board you finish. It is made by Silvergrove Labs LLC.

Can I play Loomoku in my browser?

Yes. The first chapter, First Stitches, is playable at loomoku.com/play. That is 20 puzzles with notes, undo, hints and the Tile reveal. There is nothing to install and no account to create.

Does my browser progress carry over to the app?

Not yet. Progress in the browser is saved in that browser only. The app keeps its own progress on your device.

Is it real sudoku?

Yes. Every level is a classic 9×9 sudoku with exactly one solution that can be reached by logic alone, with no guessing. From chapter 6 the Boss level of each chapter is an X-Sudoku, which adds the two long diagonals.

How hard does it get?

There are twelve grades in four tiers: Gentle, Steady, Tricky and Fiendish. Chapter one stays at grades 1 and 2, which need only the two simplest techniques. The last chapters reach grade 12, which calls for Swordfish, XYZ-Wing and simple coloring.

What happens when I make a mistake?

If the digit you tap is already visible in the same row, column or box, the move is refused and nothing is lost. If the digit is wrong in a way you could not see at a glance, it is marked and costs one life. Puzzles give you three to five lives depending on the grade, and in Gentle mode a wrong digit costs no life.

How do hints work?

Hints come in three steps. A Nudge points at the area to look at and is free. The second step names the technique and explains it, and uses one Hint unless you are meeting that technique for the first time. The third shows the exact move and can place it for you. Hints come from the same solver that grades the puzzles, so each one is a real logical step.

Are there ads, purchases or accounts?

No. Loomoku has no ads, nothing to buy with real money, and no account to create. Spools, the in-game currency, are earned only by playing.

Does the app work offline?

Yes. Every puzzle is generated on your device, so the app plays fully offline.

Which devices does Loomoku support?

iPhone and iPad running iOS 18 or iPadOS 18 or later, in portrait and landscape. The first chapter also runs in any modern web browser on a phone, tablet or computer.

More help on the support page.

Loomoku app icon: a nine-patch of indigo, clay and cream felt

Take the whole thread with you.

Loomoku: Cozy Sudoku, for iPhone and iPad.

QR code that opens Loomoku on the App StoreOn a computer? Point your iPhone or iPad camera at this code.