App Customer
Service

Sudoku· Customer Service

About Sudoku· (Tim O's Studios, Llc)

Pass the time while you challenge your mind with this classic Sudoku game. The clean, simple layout makes it easy to play for hours at a time.

The objective is simple, fill the 9×9 grid with digits so that each column, row, and the nine 3×3 sub-grids contains all of the digits from 1 to 9.
Sudoku· features:
- Daily Challenge
- Four levels (easy, medium, hard, and expert)
- Disable numbers once all 9 instances are entered
- Note taking ability
- Hint (fill in missing number when you are stuck)
- Highlight Incorrect Values
- Auto Reveal all potential notes
- Individual statistics
- Game Center with Leaderboard and Achievements

Download today for mind-challenging fun.
CategoryGames
Release DateMarch 28, 2014
Latest Version4.1
PriceFree
Age Rating4+
CompatibilityRequires iOS 13
Last UpdatedOctober 27, 2025
Size42 MB
Supported Languages (23)
EnglishCatalanDanishDutchFinnishFrenchGermanGreekIndonesianItalianJapaneseKoreanMalayNorwegianPolishPortugueseRussianChineseSpanishSwedishThaiTurkishVietnamese

What's New in Sudoku· (v4.1)

-Bug Fixes

Sudoku· Contact Information

To reach Sudoku· customer service and technical support, use the official channels below. For the fastest reply, choose the developer's official website.

Company NameTim O's Studios, Llc
Company Websitetimosstudios.com
Company Email[email protected]
Customer Servicetimosstudios.com/help
Social MediaFacebook / Twitter

Sudoku· Subscription, App Deletion & iOS Support

How do I cancel the Sudoku· subscription?

Open Settings on your iPhone or iPad, tap your Apple ID (your name) at the top, go to Subscriptions, select Sudoku· from the list and tap Cancel Subscription. Cancellation takes effect at the end of the current billing period; you can keep using the app until then. See Apple's official subscription management page for details.

How do I delete the Sudoku· app?

Touch and hold the Sudoku· icon on the Home Screen, choose Remove App and then Delete App. Important: if you have an active subscription, deleting the app does not cancel it automatically - you must first cancel your subscription using the steps above.

Sudoku· purchases, refunds and billing issues

Report billing or refund requests for Sudoku· through Apple's Report a Problem (reportaproblem.apple.com). For the app's own technical support and contact, use the developer's official website or the Sudoku· App Store page.

Distribution of Sudoku· Reviews

Of the last 100 reviews shown, 54% are positive (4–5★) and 46% negative (1–3★). App Store overall rating: 4.7 / 5

5★ 40
4★ 14
3★ 13
2★ 9
1★ 24
Most mentioned:adssudokudoneasyfunnumberschallengefreesoundnew

Sudoku· Positive Reviews and Ratings

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Great Sudoku App

Love this Sudoku app. It’s my go to app when I want to play. I have two others but this one seem to work the sudoku algorithm just right. Having said all that, there’s still a few things that need fixing. Like others have noted, the game clock should not start until the game starts. Having it start while it’s making you watch an add is dishonest. And just today I’ve found I can’t mute the sound when the ad comes on. I thought it was my iPhone so I rebooted it but I still can’t mute the sound. And the ads always ignore your sound settings and blast themselves full volume. This means you can’t use it anywhere you want.

NtringoVersion: 3.12
Grey out

I have tried many digital sudoku games and this is the best I found. If there were a way to gray out numbers that i am working on when taping on the number in column and row so that the user can see more clearly where that number would go in the other it would enhance digital game play greatly.

VicflyVersion: 4.0
Lots of changes, pretty good game now

MANY (maybe all) of the issues I read about in these reviews before trying the game have been corrected by settings to leave things as is or do the opposite. For example you can turn off the “Disable invalid note buttons” so no more filtering of just the valid numbers for the selected cell. Some of the settings are worded awkwardly but that’s because they retained the existing functionality, which overall is the norm. Also, during games the ads appear in their own designated space and not full screen so they don’t interrupt the game. And I absolutely LOVE that I can access older Daily Challenge games so no sweat if I miss a day. I’d like to see a Pause and a Restart button. Having the numbers in 2 rows is a bit awkward for me; I’d prefer all in one row so 5 and 6 are right next to each other. They really should offer an option to pay some small amount for no ads. Now that the issues have been resolved, users would pay a few bucks for that.

PollySDVersion: 3.12
Splendid but buggy

The execution of this game is good but with some glaring flaws. I like the subtle coloring scheme, the Notes function, and a lot of the optional helps. That said, the interaction with the ads is abysmal. Fine, show me ads before and after - but not during - a game. I start an Easy game to try to get the under 3 minute achievement and up pops an ad for Final Fantasy that I can't exit from for 10 seconds - and the game clock keeps ticking. What idiot thought of that? Otherwise not bad, but if you are ubercompetitive, find another Sudoku app.

Closet0takuVersion: 3.0
Easy Play - I Love Sudoku

The best thing about this app is that there is an immediate option to mute volume! One thing I struggle with, is understanding win versus loss. It’ll show a winning streak, but that winning streak gets messed up with the pop up ads. Sometimes I end up closing out a game instead of an ad and it counts as a loss. That part is frustrating, but the numbers are clear, the images easy to see, the background a great color. My old eyes like this game board. Thank you!

Stellar SpaceflowerVersion: 2.3
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Challenges at every level

Love this version. It is very challenging and I like the daily challenge button because is moves to each different level. Would be a nice feature to have the daily challenge search for an a unused date on the calendar!!

Larry PittsburghVersion: 4.0
Finally a good sudoku app

I’m adduced to the challenge of sudoku, but this app is the only one that lets me put incorrect answers on. All the others were no challenge at all because I would put a number down in a spot that it even looked like it could belong, and if it wasn’t right it wouldn’t even let me. This one we can have the real challenge!

UthnutVersion: 4.0
Time well spent!

While I normally consider myself a "solitaire man", at my wife's recommendation, I downloaded your wonderful Sudoku application this evening, and gosh am I impressed! Thank you for all that you do, and I will be sure to look for more of your fine products in the future! Eben Denton

JenniferpenelopeVersion: 4.0
Easy / Beginners puzzle spot on

Just started playing first easy puzzle was great highlights and numbers available for each box was nice at a glance, I’ll write more after I get to next levels. Easy puzzle spot on for beginners!

Tvabby17Version: 4.0
Sudoku

I have had this game for a while -really like it but in past week have had much, much trouble getting into app or re-upping a new game - right now I can’t get in to it at all without resetting my entire phone - what is going on!

LilnolamelVersion: 3.11
Great

It allows you to fill with pencil marks if you wish to save time. I have been looking for one that would have that setting, Thanks!

Postman83retiredVersion: 4.0
Ads are bad on this game

I enjoy playing the game but when the ads come up the little x in the corner is difficult to close. The timer is running on your game while the ad is up so if you are trying to beat your time it will depend on how long the ad runs.

Nanofan19Version: 3.11
Timer starts during ads

Small complaint, but why does the timer start and then the player is required to watch an ad. I’ve started games at :43 seconds on the timer due to the ad.

Owen DavidsonVersion: 4.0
Swap for more

Played three games. Then a suggestion to upgrade to 2025 version. Then in app purchase situation popped up. Could not back out to old for free. Solution, deleted app.

The Real 365/24/7Version: 4.1
Fun & Free

I love that this game is free & it's actually fun even though it's challenging & I didn't even know how to play it when I got it but was told it was fun like solitaire so I tried it & now I play it instead of solitaire ^_^ thanks for the free, fun & challenging game

Gamer Girl 3Version: 2.1
No fluff

There is no fluff in the game. All I want to do is play a game. Don’t give me a bunch of side comps or time limit or anything like that. I love it that it’s a horizontal layout. This is my go-to game.

ForRealz?Version: 4.0
Best sudoku

Like the daily challenge Then start with to the medium, hard and finally expert Just love the set up and it is my daily go to to work the brain cells THANKS,

Mary Rita WVersion: 4.0
Frustrated

Why put the delete ad x on top of the battery icon? I’m stuck

MememainVersion: 3.23
Fun and easy

Great for a presleep distraction that settles me for a good sleep! I don’t like the occasional bug that crashes and freezes the game completely for no apparent reason and requires a total reinstall with a loss of all data.

HookastVersion: 3.12
Momma Bear’s Corner

Sudoku is a nice relaxing game when you are tired or stressed and need to take a break from tv, work, social media, or any other distractions! Its very helpful for me!

Momma Bear's CornerVersion: 3.12
Great visual support

I really like the way it goes grey when I enter the last of the numbers. Helps me keep track of where I am in the game.

37691204Version: 2.1
Excellent

Easy to use. Choose your level.

Jwb211Version: 3.23
Helps me pass the time,disabled so l am always home , and good for my old brain ! 😄

5-stars

T.masherVersion: 4.1
Fun

The game causes me to think with a new challenge each play.

1029465Version: 3.22
Sudoku update

Much easier to play

SuzylooVersion: 3.22
Love the various levels

The different degrees of difficulty make for hours of brain-teasing fun. And it’s FREE!

ScarpienVersion: 4.0
Excellent

This is a very good version of sudoku. It is relaxing and easy on the eyes! My new favorite!

Smitty*kajVersion: 3.22
Fun and challenging! Highly recommend

I play this sudoku almost everyday - great brain exercise!

CjckdVersion: 2.1
Mind food

When I’m studying for exams I use this game to relax my mind and help me recognize opportunities.

Bigbill859Version: 3.0
New time does not come up.

When I play a new game the time does not change.

Johnny🎸Version: 3.12
Too many ads

Too many ads that add to your time “playing the game”

Bnl126Version: 3.0
Brain Food

This game is really good for your brain and I really enjoy it!

Bobbie MoehrVersion: 3.22
Bad advertisers

Don’t fall for iPad survey. This app has bad advertisers- Don’t use this app.

JaycaboVersion: 3.23
Why

I used this app to get gems and gold on monster legends what the hell

Tysong123Version: 3.0
Tap tap tap-out

Great game Nice graphics Non-optional sound effects a deal breaker

Sparkalon5000Version: 4.1
What the point

Love this game but it won’t go pass your ads to play please fix this

EAC lizzieVersion: 3.21
No explanation

No description

AlvarontarioVersion: 3.11
Fun joyful playing

I was playing this game it was so fun I played and played boom 15 minutes then 30 minutes best time killer ever

Not French PleaseVersion: 4.1
This is the one

I’ve tried a few apps for sodoku but this one is probably the best. I haven’t had any ads, my phone doesn’t get hot or die quickly while playing it, and you can just play the game any time without pay walls or anything. I’m not a big fan of the colour choices, but I can live with it.

Snake_Beater69Version: 4.0
Ads

Too many ads now and hidden points to get out of them.

Hankster57Version: 4.0
Amazing!

Yes I like it l almost loved it!

UntgrhgonieVersion: 3.23
Jeu passe temps

Génial passer du temps avec SUDOKU

BanzaiGWGVersion: 3.20
This sucks numericals

I wouldn’t want to not finish

ChinoCochino81Version: 3.12
Excellent

I would love to remove the adds

WhyAnyNameNeededVersion: 3.12
I really like this app!

I really enjoy this app. i didnt know how to play sudoku until i downloaded this app. this app is very easy. and it helps you learn if you don’t know how to play!

Prestyn cVersion: 3.12
Great game

Thumbs up

Lindz1482387Version: 3.12
Yugggggg

呼和浩特发个广告

KgddvugfvjVersion: 3.11
Sudoku is fun

Easy to play, variety of puzzles with different difficulties.

Brooke WendzinaVersion: 3.11
Great

Its fun

RiskmcaVersion: 3.11
Didymium

Borning now give me my free gems

ClunkynutsVersion: 3.0
Love it

Love this game. Enough levels to challenge your brain

The Easton WayVersion: 3.11
Wwe money

Where are they

Kirchmair by MattyVersion: 3.0
The norm

Not to shabby

FawndacoxVersion: 3.0
TikTok coins

Where my TikTok coins???

So so very triple funVersion: 3.0

Sudoku· Negative Reviews and Ratings

Good game play with faults

After trying nearly all of the free sudoku apps, I have rested on this one as my favorite for actual game play. The puzzles are well-designed, and even the hard and expert puzzles are actually solve-able without notes or hints if you’re good enough. That said, it is not without its faults. I don’t mind ads, but they are a little excessive, (and it is a bit jarring to see somewhat threatening NRA ads constantly). And frustrating that the clock starts on your game while you are still in the ad. The timer works fine on individual games, but the app does not accurately compile data for you to see if you are beating your own times. The “winner” screen is visually and functionally buggy and pretty useless. Despite all of this, I still play it daily for the good games. Though I imagine there will be a day when one too many NRA ads send me over the edge and I delete it forever and go buy a sudoku book.

CatpackageVersion: 3.12
Move your X please

I don’t mind seeing an ad when I open the game, but recently, the Xit button in the ad is directly below some small, white, and nearly translucent printing on my iPhone. The print has icons for signal strength and such. Because the X button is partially hidden, I can’t exit the ad. The only way out is to quit the app. It doesn’t have to move much, but it has to move.

OkArkyBlueDogVersion: 4.0
Annoying & distracting ads

The placement of the ads between the game board & the numbers is just atrocious. They flash & spin & are horrendously distracting. In addition, when making notes, only the possible numbers for that square display & it feels like cheating. There's no way to access settings as shown in here. Just 3 little marks that don't do anything instead of the buttons for settings & mute. After 2 games, I can't stand it anymore - I'm deleting it.

Jewel Match loverVersion: 2.31
Good app destroyed by ads

DELETED! This is another app I’ve had forever that I enjoyed but now it’s absolutely destroyed by obnoxious ads. It always had ads, but now they pop up so often and blast sound at me I can’t put up with it anymore. Don’t know how the app game works but I’d guess there are people out there buying out popular free apps from the developers and then driving the app into the ground with ads.

JondrewVersion: 4.0
Could be improved

Too many commercials. And the commercials have sound which means I can’t play the game in certain places. I hate that about the game!!! Sometimes the same commercial repeats twice and they go on and on for 30 seconds each.

PrusieVersion: 3.12
Notes

Notes automatically gives you all the possible numbers. It would be better if you could enter just the numbers that are possible. It’s a bit irritating to be told all the possibilities...

XdisappointedxVersion: 3.0
Too many adds

I like this game, but is it really necessary to have so many advertisements. You’re now getting two and they run around 30 seconds. It’s ridiculous.

Rescue ConnieVersion: 4.1
Used to be good but now awful!

I’ve enjoyed this for several years but the most recent update triggers ads whenever “hints” is selected. Since I normally do “hard” puzzles, I use “hints” frequently. Having to deal with an ad every time I trashes chain of thought. I will delete the app and try something else

Jmaiken4Version: 4.0
Can’t take notes without cheating

Immediately noticed that the notes option blanks out all the numbers that don’t fit in a square, which is way too easy to take advantage of. Note taking is imperative for some puzzles, and being able to find patterns is part of being a good puzzle solver. If you like being spoon fed solutions, this one’s for you.

CROWColinVersion: 3.0
Too easy

The app works fine. My only complaint being it’s too easy. I do only the “expert” level and finish most puzzles between 10 and 15 minutes. Needs to be a bit more challenging.

JXT0357Version: 3.23
Great Ad Machine

Love Soduko, this version is also for the ad Lover. Win a game, get an ad. Select a new game, get an ad. Change from daily to challenge, get an ad. When there are ad free versions of sudoko out there there is no reason to load this one!

Finnian-59Version: 4.0
Notes need to change.

I don’t like that it gives the answers when I want to use the notes. Other than that, I enjoy playing.

JRLaValleyVersion: 3.11
Why do you keep zeroing out my win streak?

It’s annoying how it erases my win streak randomly. I get very frustrated I win every game but it starts the counter over. Can this be fixed?

AntflickerVersion: 3.11
Used to be good

App has ads which is ok, but lately the ad locks up the app and there is no way to X out of it. Used to be able to X out after 30 seconds but now the ads look up the app.

NewBuffaloChipVersion: 4.0
Hope you like ads and losing sound

I don’t mind ad-supported apps. This app takes that to new levels. Watching a 30-Second ad to play a single game of sudoku is excessive. It also hijacks your audio whether or not sound is enabled.

Skipjacker68Version: 3.12
Can’t shut off sound

I’ve been addicted to this game. Recent changes made it so the ads come on blasting so I can no longer play late at night or discreetly. Therefore, I am deleting it

NorkusbinsiVersion: 3.11
Unexpectedly loud

Do you know what sudoku, solitaire, and a whole litany of what should be seemingly relaxing single person games don’t need? Loud and unexpected jarring sounds that inexplicably ignore the media volume on the phone! Tried to play this game quietly and startled everyone in the room, immediately deleted.

Gregg95620Version: 3.0
Ad button and time

Hate it, can’t get to close the ads have to get out of the game cause the x is way up there and the 30 sec of ad is in my solving time.

Oh c'mon please not be takenVersion: 3.12
Keeps freezing

Funny the ads keep appearing but I have had to reset it too many times . So I have deleted it , let me know if it ever gets fixed

William T OneVersion: 3.12
You can just punch in numbers until it tells you the correct one

Seriously what’s the point of the challenge of sudoku if I can just spam numbers until it tells me I have the correct one ?

Ali-metalVersion: 3.12
Avis

J’aimerais avoir plus de statistiques et de comparatifs sur mes performances.

Sunshine-smurfVersion: 3.12
Sudoku

C’est très agréable à jouer,car on peut ajouter les chiffres dans les carrés, pour moi c’est une première fois, que je joue comme ca, c’est vraiment plaisant!

BysantineVersion: 4.0
Timer pub

Le timer commence avant la pub , impossible de battre des record de temps

PhoquethatVersion: 4.0
Needs to be updated to close ads unplayable on new phones with a notch.

Loved the game on my older phone but with a new phone cannot play because the x to close ads is on top of the time. Clicking the fast forward and x buttons are in the notch area.

DrMartin666Version: 3.12
Intrusive App

The game itself is fine (thank you), however, the App seems to use resources beyond user-set privileges. For example, although the data and background refresh were off for the app, it could still load advertising contents. As others have already mentioned, this App is pushed on you as a condition for other things.

Ben associateVersion: 3.12
What the hell

I downloaded this app to get free stone in my singing monster. I didn’t get any !!!!!!!

Pikachu09876Version: 3.12
Not bad

A lots of hints

Augod80Version: 3.12
Scam😡😡😡😡

I used this to get chucks in fornite what the hell is going on

Menelik234Version: 3.12
Scam

Downloaded to get a reward in another game. Didn’t. Undownloaded right after word. Too many ads. Not fun. Horrible controls. Just a garbage “game” in general

High zephar dragon goneVersion: 3.12
Too many ads

It’s a good game, good app, but way too many ads.

AbcdtukvsVersion: 3.12
Sound issue

The app won’t allow you to play your music or podcasts while it’s playing so that’s a solid no dice for me.

MaimesyVersion: 3.12
Grrr

The game is fine but I downloaded it to get a perk in another game that I never received... feeling duped and for that (being mislead to download it) I’m only giving it one star. If you have to lie and cheat to get people to download your game then it’s really not doing that well now is it. 🙄

NohvaVersion: 3.12
Bad!

I was just trying to get coins in another game, and now I wasted my time. Other than that, the game isn’t even fun because it’s to easy and an add pops up every five seconds. Over all, I suggest that you don’t download this game whether it’s for sudoku or a prize.

The truth star ⭐️Version: 3.11
Spotify music cuts out

This app cuts off your music if you want to use it while listening to music, even when you turn the in app music off :/

GirlwthehornVersion: 3.11
Sudoku evaluation

No one who plays this regularly wants the answers spoon fed.

Isu582/600Version: 3.11
Good except ads

Ads are annoying

LagorakVersion: 3.11
Its fine

Im just 5rying to get a rixty card from cash for apps

OsoskddVersion: 3.11
Ads

Good game but too many ads

JdirbrvVersion: 3.11
Fake

Probably some cheap scam on how to get “FREE” stuff and doesn’t work

Lil_SpinachVersion: 3.11
Ads interfere with the game

Game does what it needs to do, however because it is timed, there is that added challenge to complete the puzzle as fast as possible. Unfortunately the developers have not accounted for unskippable 30 second ads that play in between games, and as a result, the clock already has 30 seconds on it by the time I get started.

SteelAegisVersion: 3.11
Ads affect game time

I don’t mind ads, but the game starts then the ad and so by the time you’re able to start solving the puzzle it’s 30 seconds on the clock. Deleted app.

Chucky98755Version: 3.11
Gems

Where my gems at???

SquiashiVersion: 3.0
Where the heck are my fans

So I was promised 1000 fans on TikTok and I have only 44 200 less than I had

The raging.Version: 3.0
Where’s my robux

I used this app for robux. Where is it? 😡👿😡👿😡👿😡

DideperfectfanVersion: 3.0
Too many very intrusive ads

Not only is there a banner ad in the middle of the game screen, there is a pop up full page ad every time I start a new game with loud audio. Users can mute the audio but they have to watch 5 or more seconds of the ad before the game begins. Also the “best time” page never updates and the times are out of alignment.

W MaisonneuveVersion: 3.0
Ugh

I used it where’s my prize

Nikki_Fearless_moiVersion: 3.0

Sudoku· Screenshots

Sudoku· iPhone Screenshot 1
Sudoku· iPhone Screenshot 2
Sudoku· iPhone Screenshot 3
Sudoku· iPhone Screenshot 4
Sudoku· iPhone Screenshot 5