Facebook_pixel
Killer Sudoku by Sudoku.com - Free Number Puzzle

Killer Sudoku by Sudoku.com - Free Number Puzzle

Easybrain

Solve logic puzzles with numbers and train your brain with math games!

4.7 Ratings 99K+ Reviews 1M+ Downloads
Sorry, there are no coupons for this app. You can request a coupon or check out similar offers from AppGrooves.

About Killer Sudoku by Sudoku.com - Free Number Puzzle

Ratings & Reviews

4.7
98.7K+ Ratings
  1. 5
    78+%
  2. 4
    16+%
  3. 3
    4+%
  4. 2
    1+%
  5. 1
    1+%
Write a Review
  • Excellent Game Oct 9, 2020

    By t o m a
    I really enjoy this version of Killer Sudoku. I've played hundreds of games and not seen any that were "badly formed." Some were truly devilish to solve, and I often think that the expert level could be divided into 2 levels because of the differences in difficulty among those puzzles. Like another reviewer, I also noticed that I got more expert puzzles as dailies as I went along. I assumed that the game learned the players skill level and tuned the game to present appropriate puzzles. If it does not do that then let me suggest it. One comment for improvement is on the Ads. I like the way they are handled and how I can FF through many of them, and I like that they have the Adsense triangle on most of them to allow reporting bad ads. This is especially helpful because there are a set of ads that never exit and don't provide an X or close button. Those also don't seem to render properly. On those ads the only thing that works is clicking through to their website or returning to the ad. On them I have to kill the Killer Sudoku app and restart it to move on. Yet other ads lock up my iPad almost completely. I remember groaning over and over when the killer ad came up. It was for drinkable makeup or something like that. I have iPad 4 FWIW.
    more
  • Yes a bit harder Jan 18, 2021

    By Eagle235
    If you are a regular player of sudoku and have never played this version before, start out with medium.. then work up to hard. That one is challenging but keeps your brain active. Using a combination of regular sudoku rationalizations, and the new ones you learn in this version you can solve all of the hard. The boards are well done, easy access to hard choices and for notes. I love how it eliminates numbers that are completed, and highlights choices. The software also keeps track of your records, losses and wins, how long it takes, scores, and such. The background of the game is simple...the developers could add a color back ground, art, to add more value. If you want to move to expert level, be sure you Google this type of Sudoku and learn how to use the 45 methods. That’s challenging! Great job.
    more
  • Feb 20, 2021

    By Kim Covington
    Love the game. There are ads which I accept are necessary but when the ads freeze i stop playing, getting ready to delete. I don't know what the ad is but it is 15secs & all you get is a blank white screen, with no option to get out unless you go back to home screen, & start again.
    more
  • Hard to see Nov 18, 2020

    By Multitasker mom
    Interface is easy to use. Preset numbers are black and numbers you pencil in are dark blue. Not enough contrast to easily discern which are pre-existing and which you wrote in. I tried to see if there was a way to change the font color... not there. Also magnifying glass doesn’t help me see the number total in the corner of the cages. It’s super super small. I’ve also mistaken some cage groups when they extend over to another 3x3. It would be helpful if the dotted line was in red or another contrasting color. Also when I initially started playing, I accidentally hit a wrong number- one that was not my intended target. Wasted an error bc of mistyping. There should be some way for it not to count if it is corrected immediately. I ended up turning off the error count in settings. Fix these and the game would be perfect. Disclaimer- This is my first killer sudoku. I do enjoy it. I’m not sure if others address the above issues or if they’re all the same.
    more
  • Feb 20, 2021

    By Anna Friesen
    I'm really enjoying this Sudoku. No intrusive ads! Only reason for 4 stars is the aesthetic on the home page. A few more colors or something to make it stand out a little more. I've thought I accidentally opened a help page on more than one occasion upon opening this app. Love the game, just need to add something to the home page!
    more
  • Keeps crashing & almost bricked my phone Jan 24, 2021

    By loyal peach fan
    I’d like to start off by saying I really love this app; I downloaded it after normal sudoku got too easy for me, and it’s been a fun way to challenge myself. However, a few weeks ago my phone started freezing while I was in the app, forcing me to restart it. It was a relative rare occurrence, at first, so I kept playing (there’s not much else for me to do right now in quarantine), but it’s grown more and more frequent until just now, when it crashed twice in ten minutes and the second time almost bricked my phone. (My phone made noises when I tried to restart it. It’s never done that before.) I’m deleting this app for now for the health of my phone, but I’d like to please beg the developers to fix whatever this is. I don’t know what causes it, as the crashes appear to be completely random. I have an iPhone XR, and both my phone software and the app are updated to the most recent update. I’d be more than happy to change my review once this issue is fixed, but for now I’d advise people to be wary downloading this app.
    more
  • Lagging *continued again* Jan 6, 2021

    By Dennisg02
    Update 2: lagging issues continue to occur and game freezes on a regular basis due to ads not loading. I need to force close the app on average about 1 time a minute. I contacted Support and they gave a boiler plate response of “we are working on it”. Clearly no updates have occurred. They suggest playing while on Airplane Mode so ads will not load and so the game will not freeze. This is not realistic. Update 1: I have downgraded my review to 2 stars due to there being a recent update that neglected the issue I have brought up multiple times to their support line and this issue not being resolved in the recent update. The issue of the game freezing because of the ads and forcing me to close out of the app and restart the app to unfreeze the game is still unresolved. Needs some update. The app is constantly lagging where the game time would freeze and then unfreeze about 1 minute later with that 1 minute of frozen time added to the total game time.
    more
  • Feb 22, 2021

    By L Atkinson
    Really like this game BUT what is the point of the option of no sound and no music? Does not work! Also, ads are bad enough without the sound. I'm a Sudoku junky. Fix it and you get 5 stars.
  • Update screwed up the logic worthless now Nov 17, 2020

    By Bl@ke1234
    Ok - devs you need to check the game it is not working right numbers are saying they are correct but then will dead end with either 2 numbers in a row or numbers that won’t add up to the dotted cell. I have solved over 200 puzzles on this app and only in the last week or so did puzzles start showing up with bad no solutions. Seriously I’ve even seen it on an easy puzzle just to see if it was the harder levels and even an easy puzzle the logic was clearly broken. Devs please fix so we can enjoy again. For now moving onto another app that works
    more
  • Incorrect Puzzles Jul 22, 2020

    By yagirlnick
    I have messaged twice and keep getting an (probably) automated message telling me to turn on auto-check. I already have that enabled. I’ve played about 6 daily puzzles today that are incorrect. A few puzzles allow several numbers to be entered in one box. One puzzle is complete and correct (according to auto-check), no numbers show up to fill, and it does not count it as completed. Also, most of the puzzles that are incorrect have boxes that do not add up to the number in the corner. I’m frustrated and annoyed that this is happening in general but also that I can’t seem to get a person to believe me/fix the puzzles.
    more

No reviews available

  • Excellent Game Oct 9, 2020

    By t o m a
    I really enjoy this version of Killer Sudoku. I've played hundreds of games and not seen any that were "badly formed." Some were truly devilish to solve, and I often think that the expert level could be divided into 2 levels because of the differences in difficulty among those puzzles. Like another reviewer, I also noticed that I got more expert puzzles as dailies as I went along. I assumed that the game learned the players skill level and tuned the game to present appropriate puzzles. If it does not do that then let me suggest it. One comment for improvement is on the Ads. I like the way they are handled and how I can FF through many of them, and I like that they have the Adsense triangle on most of them to allow reporting bad ads. This is especially helpful because there are a set of ads that never exit and don't provide an X or close button. Those also don't seem to render properly. On those ads the only thing that works is clicking through to their website or returning to the ad. On them I have to kill the Killer Sudoku app and restart it to move on. Yet other ads lock up my iPad almost completely. I remember groaning over and over when the killer ad came up. It was for drinkable makeup or something like that. I have iPad 4 FWIW.
    more
  • Yes a bit harder Jan 18, 2021

    By Eagle235
    If you are a regular player of sudoku and have never played this version before, start out with medium.. then work up to hard. That one is challenging but keeps your brain active. Using a combination of regular sudoku rationalizations, and the new ones you learn in this version you can solve all of the hard. The boards are well done, easy access to hard choices and for notes. I love how it eliminates numbers that are completed, and highlights choices. The software also keeps track of your records, losses and wins, how long it takes, scores, and such. The background of the game is simple...the developers could add a color back ground, art, to add more value. If you want to move to expert level, be sure you Google this type of Sudoku and learn how to use the 45 methods. That’s challenging! Great job.
    more
  • Feb 14, 2021

    By Robert Ash
    Really like this game, although a bit too easy to accidentally enter a number if you have the shakes. Also i am red/green color blind so a more vivid color to show an error. Got through with 1 error on the second game but l didn't conciously make that move and it took me ages to find the affected square!!!
    more
  • Feb 13, 2021

    By Krista K
    Now that I've been playing it a while, I'm in love with this game & paid to remove ads. The "sums" of random grouping of cells really makes this game for me. Note to developer: once a number is placed, can you require confirmation to change it? Also once placing a number, move the focus to an adjacent cell? I hate it when I accidentally change a number from a correct one and cause a mistake. 💖
    more
  • Ha! I can Sudoku! Oct 8, 2020

    By Mz. Oranj
    So I have always been fascinated by this game, but I don’t typically have whatever skills or gene required to do very well trying to fill in these puzzles. I can see the patterns, but I kept bombing even the “easy” puzzles. Those little boxes in the big boxes on this killer sudoku that let me know what the numbers each add up to are a lifesaver!!! Finally a way for me to have more confidence and certainty that I’m not just pulling a number out of thin air (and then getting it wrong). I’ve played more of this successfully than any other and am even willing (and have successfully) played some higher levels that I would never try with the traditional sudoku that I’ve seen. Yes. Love it. Only had it for a few days so far and I’ve played like 10 games I believe. Thank you
    more
  • Feb 20, 2021

    By Kim Covington
    Love the game. There are ads which I accept are necessary but when the ads freeze i stop playing, getting ready to delete. I don't know what the ad is but it is 15secs & all you get is a blank white screen, with no option to get out unless you go back to home screen, & start again.
    more
  • Hard to see Nov 18, 2020

    By Multitasker mom
    Interface is easy to use. Preset numbers are black and numbers you pencil in are dark blue. Not enough contrast to easily discern which are pre-existing and which you wrote in. I tried to see if there was a way to change the font color... not there. Also magnifying glass doesn’t help me see the number total in the corner of the cages. It’s super super small. I’ve also mistaken some cage groups when they extend over to another 3x3. It would be helpful if the dotted line was in red or another contrasting color. Also when I initially started playing, I accidentally hit a wrong number- one that was not my intended target. Wasted an error bc of mistyping. There should be some way for it not to count if it is corrected immediately. I ended up turning off the error count in settings. Fix these and the game would be perfect. Disclaimer- This is my first killer sudoku. I do enjoy it. I’m not sure if others address the above issues or if they’re all the same.
    more
  • Feb 20, 2021

    By Anna Friesen
    I'm really enjoying this Sudoku. No intrusive ads! Only reason for 4 stars is the aesthetic on the home page. A few more colors or something to make it stand out a little more. I've thought I accidentally opened a help page on more than one occasion upon opening this app. Love the game, just need to add something to the home page!
    more
  • Killer??? Jan 1, 2021

    By Skinnybaker
    First, let me say that I can do math but do not enjoy it. I can do Sudoku because it is really a logic puzzle and not really math. I read the description of Killer Sudoku, where it says that this is much harder than regular sudoku, and almost did not download it because of that. But it said there were levels that anyone could play, so I decided to give it a shot. Well. This is actually far, far easier than regular sudoku. The “extra” regions give clues and allow you to determine the correct numbers which belong in several of the boxes, before you even start “doing sudoku”. I have no idea why the developers would label this “Killer”, as it actually makes the game far easier to finish. That said, I do like this; it is nice to have something a bit different. But I will also not be deleting my traditional sudoku app. There are times when I am in the mood for more of a challenge.
    more
  • Expert near impossible Dec 24, 2020

    By Gibby6953
    I love killer sudoku in general. The app is incredibly user friendly and easy to use. I would give it a resounding 5 stars, except the difficulty levels are so off. I’ve yet to do easy or medium. The hard difficulty is fairly easy. Plenty of numbers are already given to you, and it’s usually solvable for me within 5 minutes. I’d love to go up in difficulty, but expert is almost impossible. No numbers are ever given to start out, and the cluster of boxes usually have way too many possible scenarios to narrow down to the correct answer. I usually spend 30-40 minutes on one puzzle before realizing that without many hints or guess and check work, it’s not solvable. I’m not suggesting they make Expert easier, because there’s better puzzle solvers than me. But, the Hard difficulty should be more of a challenge
    more
  • Feb 19, 2021

    By thedragyn
    This is a fun game and I like the daily challenge. I don't like the automatic indication that an answer is wrong and then getting only three tries. When you have big fingers and play on a phone it's too easy to hit the wrong button. If there was an option to turn that feature off, I would give another star. The other complaint I have is that the number indicating the sums is too small and difficult to read - even on a tablet because those numbers are still the same small size.
    more
  • No true difficulty between medium and impossible Nov 13, 2020

    By tiabtjdksktk
    This is a really fun game, but there is no true difficulty between medium and next to impossible. What is labeled “hard” right off the bat gives you so many numbers already filled in, sums of two that are already half filled, or individual sum boxes that you get about half the answers without even having to think and then you can fill the rest of it in usually without having to use any notes. Then you get to “expert”, which has no numbers filled in, usually about one individual sum box and way too many sum boxes of 4 or 5. I have tried and tried and cannot pass these levels without using way too many hints. I would like to see harder “hard” levels at least, as they’re no more difficult than medium, and maybe slightly more possible “expert” levels.
    more
  • Feb 12, 2021

    By Jamie Telfer
    A good sudoku game with far too many ads. Start a level? Ad. Finish a level? Ad. Pause a level? You guessed it, ad. If you play with the guess limit, you watch an ad if you get too many wrong. One clue per round, unless you watch an ad to get more. But sometimes I watch an ad and don't even get the clue. I tried to purchase the ad-free upgrade, but the app will not accept the balance in my Play account as currency. The support team tried to help, but weren't able to resolve the problem. Still ok
    more
  • Feb 23, 2021

    By Tea_3008
    I love killer Sudoku in general and in general the app is great but the last few days I played a lot and I think I have seen some twice now. Also I found at least two where the numbers in the cages repeat which is a bit annoying when it marks a mistake but that is the only place the number can go by the rules
    more
  • Really loved but now issues freezing Jan 17, 2021

    By StephTSS
    I was really loving this app but here in the last couple of weeks I have issues with it freezing up. I go into the Daily puzzle and maybe enter one number and it freezes and I have to quit. Then try again and maybe two numbers. This goes on a few times and then it was letting me finish until yesterday. It wouldn’t let me do more than one at a time. It was really fun and I have really gotten into it and was really getting the hang of it. I hadn’t ever played this way before but I loved Sudoku to I gave it a try. I am using an iPhone 8Plus and am running the most current iOS and have the app updated to the current version showing in the App Store.
    more
  • Update screwed up the logic worthless now Nov 17, 2020

    By Bl@ke1234
    Ok - devs you need to check the game it is not working right numbers are saying they are correct but then will dead end with either 2 numbers in a row or numbers that won’t add up to the dotted cell. I have solved over 200 puzzles on this app and only in the last week or so did puzzles start showing up with bad no solutions. Seriously I’ve even seen it on an easy puzzle just to see if it was the harder levels and even an easy puzzle the logic was clearly broken. Devs please fix so we can enjoy again. For now moving onto another app that works
    more
  • Freezes Up Jan 14, 2021

    By Hawk Colt
    I loaded this app about a week ago. I really enjoyed it until it started to freeze up on my iPad after opening the game. I sometimes have to open it up and close it three or four times before I can get through a game. It has always been at the beginning of the too like it is having difficulty loading completely. The one I am on right now I have a total of one minute running time and I have already opened and closed it 5 times. Probably will be deleting this game soon if this continues.
    more
  • Notes needs improvement Jul 31, 2020

    By Tyles3
    The blue on/off switch for the notes changes the number color from blue to gray. It’s not enough of a difference so sometimes you click a number in for notes and your aren’t actually in notes. The blue button saying that notes is on has the blue button for hints right next to it so you might think the notes are on when it’s just that you have a hit(or ad for a hint) waiting. It just bugged me enough to delete the app.
    more
  • Easy or impossible, no in between Dec 4, 2020

    By Unsatisfied6262
    Found the hard ones to be too easy and the expert ones impossible to logically figure out. Can’t select a number that isn’t in the grid to see where it has been noted. For instance if I am looking for all of the possible 4s but there isn’t a 4 filled in, there is no way to highlight. Switching the note on and off is a pain. Would be nice if there was a separate keypad for notes vs final numbers
    more
  • Very Dissappinted Feb 17, 2021

    By Risris16
    Very disappointed in this app. I LOVE killer sudoku and it’s so addicting. But this app is terrible. It glitches and crashes every 5 seconds. After I fill in about 3-4 cells it freezes and crashes. It makes what should be a 6ish minute game take almost 40. It is so frustrating. All I want to do is play but it keeps freezing. I’ve tried to contact support but they didn’t have any help except play in offline mode.
    more
  • Keeps crashing & almost bricked my phone Jan 24, 2021

    By loyal peach fan
    I’d like to start off by saying I really love this app; I downloaded it after normal sudoku got too easy for me, and it’s been a fun way to challenge myself. However, a few weeks ago my phone started freezing while I was in the app, forcing me to restart it. It was a relative rare occurrence, at first, so I kept playing (there’s not much else for me to do right now in quarantine), but it’s grown more and more frequent until just now, when it crashed twice in ten minutes and the second time almost bricked my phone. (My phone made noises when I tried to restart it. It’s never done that before.) I’m deleting this app for now for the health of my phone, but I’d like to please beg the developers to fix whatever this is. I don’t know what causes it, as the crashes appear to be completely random. I have an iPhone XR, and both my phone software and the app are updated to the most recent update. I’d be more than happy to change my review once this issue is fixed, but for now I’d advise people to be wary downloading this app.
    more
  • Lagging *continued again* Jan 6, 2021

    By Dennisg02
    Update 2: lagging issues continue to occur and game freezes on a regular basis due to ads not loading. I need to force close the app on average about 1 time a minute. I contacted Support and they gave a boiler plate response of “we are working on it”. Clearly no updates have occurred. They suggest playing while on Airplane Mode so ads will not load and so the game will not freeze. This is not realistic. Update 1: I have downgraded my review to 2 stars due to there being a recent update that neglected the issue I have brought up multiple times to their support line and this issue not being resolved in the recent update. The issue of the game freezing because of the ads and forcing me to close out of the app and restart the app to unfreeze the game is still unresolved. Needs some update. The app is constantly lagging where the game time would freeze and then unfreeze about 1 minute later with that 1 minute of frozen time added to the total game time.
    more
  • Feb 22, 2021

    By L Atkinson
    Really like this game BUT what is the point of the option of no sound and no music? Does not work! Also, ads are bad enough without the sound. I'm a Sudoku junky. Fix it and you get 5 stars.
  • Incorrect Puzzles Jul 22, 2020

    By yagirlnick
    I have messaged twice and keep getting an (probably) automated message telling me to turn on auto-check. I already have that enabled. I’ve played about 6 daily puzzles today that are incorrect. A few puzzles allow several numbers to be entered in one box. One puzzle is complete and correct (according to auto-check), no numbers show up to fill, and it does not count it as completed. Also, most of the puzzles that are incorrect have boxes that do not add up to the number in the corner. I’m frustrated and annoyed that this is happening in general but also that I can’t seem to get a person to believe me/fix the puzzles.
    more
  • Privacy settings not accessible Jan 30, 2021

    By an angry stoat
    I tried to turn off personalized ads and it would not show me the page to do so. Uninstalled. Regarding the developer's response : That is not a satisfactory answer. Per your own privacy policy, it states that I needed to go into the settings of the app in order to turn off personalized ads, and indeed there is a menu selection in your app for ad settings that attempts to take you somewhere but does not work. If this is truly not the way to turn off ad personalization it should be removed from your app and the privacy policy needs to be updated.
    more

What’s Groovy

What’s Subpar

Loading...

1 Coupon in Puzzle Games