Free on Google Play · Android

Sudoku, reimagined in 3D

Six faces share their edges. A row on the front keeps going on the right face, and a corner digit counts three times. Rotate the cube, think across faces, solve.

Get it on Google Play Watch the trailer

Free to play, funded by ads. No puzzle is ever behind a paywall. Works offline.

1,200

handcrafted puzzles · 60 packs

new Daily Cube every day

themes · 27 cube styles

languages, RTL Arabic

Rows wrap over the edges

The idea

One cube. Every face is a full Sudoku.

Cells on an edge belong to two faces at once, and the three corner cells belong to three. Place a digit there and it has to work for every grid it touches. That is the whole twist, and it changes how you think.

Edges

Rows and columns wrap around

Select a cell and the highlight bends over the edge onto the next face. What you rule out on one face is ruled out on its neighbour too.

Hints

Help when you are stuck

Select a cell and a hint reveals its digit, or tap Check to find your mistakes. Each puzzle comes with a few of each, and a short ad adds more. In the trainer, a hint still lights the next cell and says why it must be that digit.

Views

Unfold it, or see through it

Flip the cube into a flat cross net any time, or turn on transparent mode and read every face while it turns.

Tools

Pencil marks, undo, auto-check

Everything a paper solver wants: candidates in every cell, unlimited undo and redo, and instant checking if you want it.

Anywhere

Plays offline

The 400 puzzles in the app need no connection, a pack you download stays on your phone, and the Daily Cube plays offline too.

Accessible

Built to be read

Adjustable digit size, a colourblind-safe palette, reduced motion, TalkBack support, and eight languages including right-to-left Arabic.

Ways to play

Fifteen ways to play, from a quiet Easy pack to a cube that turns itself

Eight are yours from the first launch. The seven others open as you play: reach a level, or earn a trophy. In the app, Game modes on the home screen shows them all and what each one takes.

Puzzle packs1,200 handcrafted cubes in 60 packs, Easy to Expert. 400 come with the app, and 800 more download one pack at a time for a short ad. Finish a pack to unlock the next.

One Face NewClassic 9×9 sudoku on the front face of the cube, the other five left blank. The cube only tilts, so the puzzle stays in front of you, and a game takes 5 to 20 minutes. 2,000 puzzles come with the app, and 4,000 more download one pack at a time for a short ad.

Daily CubeA new cube every day, the same for every player, a seven-day archive, and a streak to keep.

Killer CubeNo digit clues. Cages with sums, and the cages wrap across edges too.

Technique TrainerStep-by-step lessons on the cube's own logic, with live guidance.

Corner ConquestFill only the eight corner cells, each one shared by three faces, before the clock runs out: 25 minutes on Easy, 15 on Expert. A wrong corner costs a minute, any other mistake 30 seconds.Open from the start

Beat the Clock NewSolve the whole cube before the countdown ends: 25 minutes on Easy, up to 75 on Expert. There are no hints, and each mistake takes a minute off the clock.Open from the start

Tifinagh NewClassic sudoku where the nine digits are nine letters of the Amazigh alphabet of Morocco: ⴳ ⴷ ⴼ ⴽ ⵅ ⵇ ⵛ ⵢ ⵣ. You solve by shape, not by counting, with the letters and their names beside the board. A best time for each level.Open from the start

Speed Run NewReplay a pack puzzle you have solved and beat your own time. A mistake adds 30 seconds to it, a hint 1:30.Opens at level 3

Tug of War NewYour time is a bank, 10 to 25 minutes by level. Every right digit pays a few seconds in; a mistake, a hint or an undo takes some out. Solve the cube before it runs dry.Opens at level 5

Lightning Round NewFifteen minutes of small cubes, one after another, the next one ready the moment you finish. Solve as many as you can: there are no hints, and a mistake costs 10 seconds.Opens with the Perfect Solve trophy, or at level 7

Survival NewCube after cube on a 10-minute bank. Every solve refills it, every third solve raises the level, and mistakes and hints drain it. Retire whenever you like to keep your score.Opens at level 8

Missions NewA cube dealt with one to four missions to keep, like “Start with 7”, “Corners first” or “No pencil”. Break half of them and the party is lost; keep them and a win pays double XP. The Daily Mission is the same for everyone.Opens with the Week Warrior trophy, or at level 10

Roulette NewYou never turn the cube: it turns itself every minute, or every 30 seconds to 3 minutes as you choose, and you solve what it shows. Drag to peek, and it swings back. A right digit buys 5 more seconds of view, a wrong one turns the cube at once. Your time is your score.Opens at level 12

Endless NewUnlimited cubes made on your phone, at the level you choose, with no clock.Opens with the Bronze Streak trophy, or at level 22

Screens

What it looks like

Ten captioned screenshots, captured on a phone in the Neon theme. Swipe through.

Peer-cross highlight wrapping the edge — 02 · Rows wrap over the edge

Themes

31 ways to dress the cube

A theme is not a skin on the cube alone — it repaints the header, the tray, the number pad and the menus with it. Below, the same puzzle at the same angle in every one. Each row scrolls on its own.

All 31 themes

The cube in the Obsidian Cyan theme — Obsidian Cyan

The cube in the Royal Violet theme — Royal Violet

The cube in the Emerald Circuit theme — Emerald Circuit

The cube in the Amber Noir theme — Amber Noir

The cube in the Crimson Noir theme — Crimson Noir

The cube in the Aurora Mint theme — Aurora Mint

The cube in the Ocean Slate theme — Ocean Slate

The cube in the Copper Ember theme — Copper Ember

The cube in the Master Plate theme — Master Plate

The cube in the Ocean Deep theme — Ocean Deep

The cube in the Standard theme — Standard

The cube in the Colorblind theme — Colorblind

The cube in the High Contrast theme — High Contrast

The cube in the Solar Sand theme — Solar Sand

The cube in the Arctic Glass theme — Arctic Glass

The cube in the Coral Bloom theme — Coral Bloom

The cube in the Lavender Mist theme — Lavender Mist

The cube in the Mono Ice theme — Mono Ice

The cube in the Cherry Pop theme — Cherry Pop

The cube in the Orange Burst theme — Orange Burst

The cube in the Lemon Drop theme — Lemon Drop

The cube in the Lime Twist theme — Lime Twist

The cube in the Blueberry Splash theme — Blueberry Splash

Same puzzle, same angle, 31 palettes. The cube style is each theme’s own default.

See every theme and cube style

Light beams and lifted digits

The cube with its light beam switched off — No beam

Green light beam along the cube's edges — Green beam

White light beam along the cube's edges — White beam

Red light beam along the cube's edges — Red beam

Pink light beam along the cube's edges — Pink beam

Purple light beam along the cube's edges — Purple beam

Matching digits printed flat on the cube faces — Digits flat

Every matching digit raised out of its square — Digits lifted

Beams are free and layer over any theme or cube style. Lifted digits raise every copy of the digit you pick.

Trailer

See it move

Half a minute, no sound. The cube turning, a row wrapping over the edge, matching digits rising out of the faces, the light beams, all 26 themes and the unfolded net.

1280×720 · 0:29 · silent · 2.4 MB

Support

Questions, bugs, ideas

Contact

Questions, bug reports, or feedback?

support@virt-services.com

Privacy

No account, no name, no email. What the app does collect, in plain words.

Read the privacy policy →

Version

Current release: 1.7.1

Platform: Android

How do shared edges work?

Cells that sit on an edge between two faces appear on both faces at once. When you place a digit in that cell, it counts toward the rows, columns and boxes on every face it belongs to. The three cells at each corner belong to three faces. That is what makes the cube different from six flat grids.

My progress disappeared — what happened?

Your progress is stored on your phone, and with Google Play Games it is also backed up to your own Google account: automatically after a puzzle and when you leave the app, or at any time with Settings → Account → Back up now. On a new phone or after reinstalling, once Play Games has signed you in, the home screen offers to restore your progress, and Settings → Account → Restore progress does it at any time. Without Play Games, uninstalling the app or clearing its data erases your progress.

How do I change the language?

Settings → Language. The app speaks English, Français, Español, Português, Deutsch, العربية, 日本語 and 한국어.

How do I opt out of personalised ads?

Settings → Account → Privacy Settings inside the app changes your ad consent at any time, where your region requires a choice. You can also reset your advertising ID in your Android settings under Privacy → Ads.

Why does the next puzzle sometimes ask me to watch an ad?

The game is free and funded by ads. Some puzzles open right away; others open after a short ad, or on their own after a wait if you would rather not watch one. Nothing is ever locked behind a purchase, because there are no purchases.

How do I get more puzzle packs?

Finish a pack to unlock the next. Each level starts with the packs in the app; after them, the next pack downloads for a short ad and is yours to keep, offline too. It is downloaded and checked before the ad starts, so a failed download never costs you an ad. There are 60 packs so far, 1,200 puzzles in all.

How do I open the other modes?

The packs, One Face, the Daily Cube, Killer Cube, the trainer, Corner Conquest, Beat the Clock and Tifinagh are open from the first launch. The others open as you play, each at a level, and three of them sooner with a trophy: the cards under Ways to play say what each one takes. In the app, tap a locked mode to see how far you are, or tap Game modes on the home screen to see them all.

Something else?

Email support@virt-services.com and we will get back to you as soon as we can.