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Killer Sudoku by Sudoku.com - Free Number Puzzles

Killer Sudoku by Sudoku.com - Free Number Puzzles

Easybrain

Killer Sudoku: solve daily number puzzles and train your brain with sudoku!

4.7 Ratings 160K+ Reviews 5M+ Downloads

Ratings & Reviews

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  • 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.
  • Jul 28, 2021

    By Seth Klein
    Before this update I would have rated 5 star. I loved this game until latest update. With latest update they added an ad in the middle of each puzzle which breaks my concentration. An ad before and after each puzzle was and is fine but in the middle of the puzzle doesn't work for me at all. Since I can do the easy puzzles in 2 mins and the hard ones in 7-8 that is a lot of extra ads for me. They keep sugesting using the option to shut off the ads but it costs $2 & change.
  • UPDATE: More variety needed Jul 6, 2021

    By Squirrels & Bacon
    The game is fun until you get good at it, and then almost ALL of the daily challenges become “Hard” or “Expert”, with over half being Expert. These games start with NO numbers so you are forced to watch ads to get Hints (numbers) to put in the puzzle. Otherwise, the daily game is impossible. Here’s a novel idea - how about keeping the same or SLIGHTLY modified diversity of game difficulties in all months? My response to all the Expert games is to just not do them. I refuse to watch 10-20 ads just to finish one game. And that means less activity and less ads that I view. So it actually does the opposite of the intended result - I view less ads so the game gets less revenue. Change the daily games back to varied difficulty and I’ll play more, see more of the usual ads, and give a higher rating; until then, I’m playing less and the rating remains at one star. Thanks for listening. ————— UPDATE: The developer responded very quickly and explained the daily challenge randomization. I appreciate their reply and suggestions. Therefore, I have changed my rating to 4 stars. Still need to try their suggestions!
  • Jul 21, 2021

    By Santiago Sinatra
    Great game! Despite all the reviews that say that the ads are too much, i find that one ad per game is not that much since at least for me each game, even in the easiest difficulty has lasted for at least 10 minutes. I did find that in certain modes there is one ad in the middle of the game but again, i was playing for like 11 minutes or so. Im clarifying this because the first impression I got from the reviews was that the ads were painful and that isn't the case. Anyway awesome game!
  • 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.
  • Jul 28, 2021

    By Lynette Galloway
    The rating I gave before was for a person who couldn't get the game...AT FIRST! Now, I'm enjoying the heck out of it! BUT, there is just one aspect I would change: allow players to change the blocks as well as background. It would be a bit more comfortable once you get the hang of it!
  • 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.
  • Jul 27, 2021

    By Diana Quill
    It's a good game. The ads aren't invasive to the point of interrupting gameplay except when you complete a number and it gives you an ad, but that's on a timer, so if you finish all the numbers at once then you don't get the ad. It's got a lot of smaller touches that makes it feel a lot more polished and nice. I like it, it's got a lot of ads for ending a game and for hints and everything. I wish you could have a sandbox mode where mistakes weren't counted, but overall, a lovely game.
  • Great game, but needs a fix! Feb 27, 2021

    By Fluffy Auntie
    I’m really enjoying this game. It is somewhat harder than sudoku, and I love that the math makes me exercise a different part of my brain. However, there is one change that needs to be made ASAP! I’m using an iPad, and when I touch the screen in the wrong place, it overwrites the correct number (that I’ve already entered) with whatever random number I accidentally selected. A “note” can even supersede the correct number. Once you’ve entered the correct number, that cell should be locked- there’s no reason you’d change it. Please!!! I’ve lost so many games in this way, and it is extremely frustrating. One other idea is that the screen could change colors (or something) when you go in and out of note mode. It’s too easy to lose track of which mode you’re in, and I’ve lost a lot of games due to this issue as well.
  • Love expert levels! Jul 9, 2021

    By hetkeyup
    This game makes me feel so rewarded & smart! I have gotten down from 1:30 to twenty minutes sometimes for the expert levels as a develop more techniques. I like how it uses both math and logic. I keep myself to the three mistake limit and only use the one free hint if I am really stuck. Each box, row, and column add up to 45 and sometimes I rack my brain by using a 90 group to solve for one number. It feels so good to solve that I just keep opening another and another. Thanks for all the different settings (night mode black background, highlighting). One suggestion I would love is to be able to make some notated numbers a different color or italics, which I would use for “all of the possible options” verses numbers that *must fit “either here or there.”
  • 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.
  • Jul 28, 2021

    By Seth Klein
    Before this update I would have rated 5 star. I loved this game until latest update. With latest update they added an ad in the middle of each puzzle which breaks my concentration. An ad before and after each puzzle was and is fine but in the middle of the puzzle doesn't work for me at all. Since I can do the easy puzzles in 2 mins and the hard ones in 7-8 that is a lot of extra ads for me. They keep sugesting using the option to shut off the ads but it costs $2 & change.
  • UPDATE: More variety needed Jul 6, 2021

    By Squirrels & Bacon
    The game is fun until you get good at it, and then almost ALL of the daily challenges become “Hard” or “Expert”, with over half being Expert. These games start with NO numbers so you are forced to watch ads to get Hints (numbers) to put in the puzzle. Otherwise, the daily game is impossible. Here’s a novel idea - how about keeping the same or SLIGHTLY modified diversity of game difficulties in all months? My response to all the Expert games is to just not do them. I refuse to watch 10-20 ads just to finish one game. And that means less activity and less ads that I view. So it actually does the opposite of the intended result - I view less ads so the game gets less revenue. Change the daily games back to varied difficulty and I’ll play more, see more of the usual ads, and give a higher rating; until then, I’m playing less and the rating remains at one star. Thanks for listening. ————— UPDATE: The developer responded very quickly and explained the daily challenge randomization. I appreciate their reply and suggestions. Therefore, I have changed my rating to 4 stars. Still need to try their suggestions!
  • Jul 21, 2021

    By Santiago Sinatra
    Great game! Despite all the reviews that say that the ads are too much, i find that one ad per game is not that much since at least for me each game, even in the easiest difficulty has lasted for at least 10 minutes. I did find that in certain modes there is one ad in the middle of the game but again, i was playing for like 11 minutes or so. Im clarifying this because the first impression I got from the reviews was that the ads were painful and that isn't the case. Anyway awesome game!
  • 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.
  • Jul 28, 2021

    By Lynette Galloway
    The rating I gave before was for a person who couldn't get the game...AT FIRST! Now, I'm enjoying the heck out of it! BUT, there is just one aspect I would change: allow players to change the blocks as well as background. It would be a bit more comfortable once you get the hang of it!
  • 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.
  • Jul 27, 2021

    By Diana Quill
    It's a good game. The ads aren't invasive to the point of interrupting gameplay except when you complete a number and it gives you an ad, but that's on a timer, so if you finish all the numbers at once then you don't get the ad. It's got a lot of smaller touches that makes it feel a lot more polished and nice. I like it, it's got a lot of ads for ending a game and for hints and everything. I wish you could have a sandbox mode where mistakes weren't counted, but overall, a lovely game.
  • Great game, but needs a fix! Feb 27, 2021

    By Fluffy Auntie
    I’m really enjoying this game. It is somewhat harder than sudoku, and I love that the math makes me exercise a different part of my brain. However, there is one change that needs to be made ASAP! I’m using an iPad, and when I touch the screen in the wrong place, it overwrites the correct number (that I’ve already entered) with whatever random number I accidentally selected. A “note” can even supersede the correct number. Once you’ve entered the correct number, that cell should be locked- there’s no reason you’d change it. Please!!! I’ve lost so many games in this way, and it is extremely frustrating. One other idea is that the screen could change colors (or something) when you go in and out of note mode. It’s too easy to lose track of which mode you’re in, and I’ve lost a lot of games due to this issue as well.
  • Love expert levels! Jul 9, 2021

    By hetkeyup
    This game makes me feel so rewarded & smart! I have gotten down from 1:30 to twenty minutes sometimes for the expert levels as a develop more techniques. I like how it uses both math and logic. I keep myself to the three mistake limit and only use the one free hint if I am really stuck. Each box, row, and column add up to 45 and sometimes I rack my brain by using a 90 group to solve for one number. It feels so good to solve that I just keep opening another and another. Thanks for all the different settings (night mode black background, highlighting). One suggestion I would love is to be able to make some notated numbers a different color or italics, which I would use for “all of the possible options” verses numbers that *must fit “either here or there.”
  • Jul 30, 2021

    By Tamisha Cauley
    1 puzzle 6 ads. Before starting there was an ad. Once started there were no ads for the first 5 minutes. After that there was an ad every 90 seconds. Then another ad after finishing the puzzle. I get the developers need to make money but this is overkill. I uninstalled 20 minutes after installing just because of that.
  • Jul 30, 2021

    By Mark Mayo
    Ads right in the middle of the game! I understand between or to continue after so many mistakes. BUT RIGHT IN THE MIDDLE OF THE GAME!
  • 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.
  • Jul 29, 2021

    By Singing Seagull
    Really enjoy the game, and I understand that ads are a necessary evil to preserve free use of apps, but now that ads pop up IN THE MIDDLE OF GAMES it's killing killer sudoku for those of us who are concentrating and racing against the clock. Would be 5*'s but because of this I can only give 1*. What a crock.
  • Jul 29, 2021

    By A Google user
    its a simple and lovely game fitting my play-style but on god the ads are too much. TOO MUCH. i usually dont mind ads and understand their benefit but to the point where they hinder my game? an ad popping out in-mid my game? i couldn't stand it. deleted.
  • Jul 28, 2021

    By Jenn Anderson
    I have really enjoyed this app & played daily until the last 6 weeks or so, due to a crazy schedule. I come back and find there are now ads during the game play, not just between levels like I was used to & was perfectly fine with. I feel this is infuriating and insulting by the developer. I am trying to beat my best time, & to have it suddenly disappear for an ad, and then reappear with the time ticking, or even some glitch, is not ok!!! I can not just pick up where I left off like nbd.
  • Jul 28, 2021

    By Kelly Cooper
    I have started get ads in the middle or towards the end of a puzzle. This is really annoying and stops my flow of entering numbers. If it continues, I will be uninstalling.
  • Jul 29, 2021

    By luke niemeyer
    Worst app I've used in a long time. You get ads for finishing off a number in your puzzle. You're seriously going to stop me mid puzzle to show me an ad? Absolutely not.
  • Jul 30, 2021

    By Relja Kovačević
    Killing people with ads for small amount of money you are earning from them will make people delete the game, so nobody will watch those commercials. Stop spamming with 1-3 ads in the middle of the game and I will get back to this game!
  • Game disappeared following a “second chance” ad Mar 17, 2021

    By NWILgal
    I am new to this game and have so far played only two daily puzzles. Today was my third, and it was a difficult puzzle that required some guesswork. I hadn’t figured out “notes” yet, and I also just tapped a couple of incorrect digits by mistake. A player is allowed three errors before the game must be restarted or the player must sit through a 30 second ad to get one more chance. I was loathe to restart the game I’d worked on so hard and had watched several ads to continue, so I requested a second chance. The ad ran its course, then my screen reverted to my home page. When I tapped the Killer Sudoku icon, the day’s puzzle appeared, but it had reset to the beginning. Needless to say, I was more than a little disappointed and angered. I understand that watching ads helps pay for the game if I want to play for free, but the developers should hold up their side of that bargain.

No reviews available

No reviews available

  • 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.
  • Jul 21, 2021

    By Santiago Sinatra
    Great game! Despite all the reviews that say that the ads are too much, i find that one ad per game is not that much since at least for me each game, even in the easiest difficulty has lasted for at least 10 minutes. I did find that in certain modes there is one ad in the middle of the game but again, i was playing for like 11 minutes or so. Im clarifying this because the first impression I got from the reviews was that the ads were painful and that isn't the case. Anyway awesome game!
  • Jul 27, 2021

    By Diana Quill
    It's a good game. The ads aren't invasive to the point of interrupting gameplay except when you complete a number and it gives you an ad, but that's on a timer, so if you finish all the numbers at once then you don't get the ad. It's got a lot of smaller touches that makes it feel a lot more polished and nice. I like it, it's got a lot of ads for ending a game and for hints and everything. I wish you could have a sandbox mode where mistakes weren't counted, but overall, a lovely game.
  • Love expert levels! Jul 9, 2021

    By hetkeyup
    This game makes me feel so rewarded & smart! I have gotten down from 1:30 to twenty minutes sometimes for the expert levels as a develop more techniques. I like how it uses both math and logic. I keep myself to the three mistake limit and only use the one free hint if I am really stuck. Each box, row, and column add up to 45 and sometimes I rack my brain by using a 90 group to solve for one number. It feels so good to solve that I just keep opening another and another. Thanks for all the different settings (night mode black background, highlighting). One suggestion I would love is to be able to make some notated numbers a different color or italics, which I would use for “all of the possible options” verses numbers that *must fit “either here or there.”
  • 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
  • Great App Jul 5, 2021

    By Clay4
    This is my favorite app. I love the different challenges they have incorporated into the game. Only two things I think would make it better. (Hopefully the devs will read this) 1. If the puzzle has the correct number in the right location, it would be nice if it would lock it to where you can’t change it. Many times I accidentally hit a tile I have already found the answer for and end up changing it. 2. Have the ability to change a number you have put your finger on. For example, if you are trying to choose a 1 but you accidentally touch the 2 first…there is no way to slide you finger over to the 1 or slide your finger off the number to pick the correct one. I’d love to see these changes.
  • All the daily puzzles are expert level. Jun 26, 2020

    By Parfect
    Really liked this app when I first started playing. I work the daily puzzle and also work my way through the older ones. I liked that they range in the different levels, although now every one I get is set at the expert level, so that means having to watch a video to get hints so I can at least get to the part that would make it hard. Why does it do that. I know I can just start a new game at any level I want but I like playing the daily challenges. Would give 5 stars if this is fixed. Update: Thanks for the reply from the app developer explaining things. The daily puzzle today was not an expert. I will take your advice and see what happens.
  • Fun and sometimes tricky Jan 29, 2021

    By Cammie84
    I love this versions of Sudoku. When I get stuck I just look to the sum I’m looking to make and solve easily. I find myself having faster solve times. Often under 10 minutes for medium and hard difficulty levels and under 15 minutes for the extreme difficulty. The only thing I don’t like is if you accidentally enter 3 mistakes then you either have to watch a video to continue on or start all over. I have forgotten to remove the hold from the number I’m working on and have gone to enter the next number in and caused an error because the number was on lock. That’s the only frustrating thing I’ve come across.
  • Was loving but now it’s getting glitchy... Mar 2, 2021

    By Sad Playa
    I have been playing a lot over the last few months. I had been loving and gradually worked my way up to hard (expert is still way beyond me). However, yesterday, I noticed that there some errors in the puzzle. For example, the color block will say it needs to add up to 10. But it actually needs to add up to 9. There have also been LOTS of duplicate numbers in the rows...it stinks bc I was really enjoying playing but now I have to find a new game😭! Upon further review, I did have a setting off...I apologize profusely!! Thanks for your feedback and your awesome game!!😀
  • UPDATE: More variety needed Jul 6, 2021

    By Squirrels & Bacon
    The game is fun until you get good at it, and then almost ALL of the daily challenges become “Hard” or “Expert”, with over half being Expert. These games start with NO numbers so you are forced to watch ads to get Hints (numbers) to put in the puzzle. Otherwise, the daily game is impossible. Here’s a novel idea - how about keeping the same or SLIGHTLY modified diversity of game difficulties in all months? My response to all the Expert games is to just not do them. I refuse to watch 10-20 ads just to finish one game. And that means less activity and less ads that I view. So it actually does the opposite of the intended result - I view less ads so the game gets less revenue. Change the daily games back to varied difficulty and I’ll play more, see more of the usual ads, and give a higher rating; until then, I’m playing less and the rating remains at one star. Thanks for listening. ————— UPDATE: The developer responded very quickly and explained the daily challenge randomization. I appreciate their reply and suggestions. Therefore, I have changed my rating to 4 stars. Still need to try their suggestions!
  • 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.
  • Jul 28, 2021

    By Lynette Galloway
    The rating I gave before was for a person who couldn't get the game...AT FIRST! Now, I'm enjoying the heck out of it! BUT, there is just one aspect I would change: allow players to change the blocks as well as background. It would be a bit more comfortable once you get the hang of it!
  • 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.
  • Great game, but needs a fix! Feb 27, 2021

    By Fluffy Auntie
    I’m really enjoying this game. It is somewhat harder than sudoku, and I love that the math makes me exercise a different part of my brain. However, there is one change that needs to be made ASAP! I’m using an iPad, and when I touch the screen in the wrong place, it overwrites the correct number (that I’ve already entered) with whatever random number I accidentally selected. A “note” can even supersede the correct number. Once you’ve entered the correct number, that cell should be locked- there’s no reason you’d change it. Please!!! I’ve lost so many games in this way, and it is extremely frustrating. One other idea is that the screen could change colors (or something) when you go in and out of note mode. It’s too easy to lose track of which mode you’re in, and I’ve lost a lot of games due to this issue as well.
  • Hard levels are too easy and expert levels are impossible Mar 9, 2021

    By JFUDHIDHjehxj
    Title says it. Hard levels take between 5 and 10 minutes and I have never once gotten stuck, just fly through them once I’m writing down notes. Expert levels I get stuck on and can’t make a move after investing close to 20 minutes and filling in all available notes. Hints are useless. I’m not trying to instantly solve the level, I’m trying to get better at the puzzles. The regular sudoku app hints are much better, because the hints actually tell you what you should look at and what the next move should be. Expert levels are now just a waste of 20 minutes and completely unsolvable to the average person. Maybe add a harder expert mode and split current expert levels? Maybe add useful hints? Maybe add a help section with tips for really hard levels??
  • 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
  • One issue... May 30, 2021

    By Periwinklelly
    I really enjoyed this game! It’s packed with all sorts of amazing levels! The idea of making “killer sudoku” is great and I love how you can change the difficulty level as you get better at the game. I had been playing for a while and I decided to try an expert level. One of the cages in the expert level said 9 in the corner so I knew this cage had to add up to 9. Based on other numbers around it, I knew one of the digits had to be 5. But when I put 4 in the other cage, knowing that 5+4=9, the number became red and it said that answer was wrong. So I tried 3. It worked. But when you add five plus three it only equals 8! At this point I was so confused but this happened more and more times in the level like it said that 7 plus 5 is 14 and I just stopped the game. I would have rated five stars if it wasn’t for that level.
  • Jul 29, 2021

    By Kate S
    Seriously - ads now appearing in the middle of a game when I haven't even made any mistakes? I don't mind ads at all, but not appearing at random points when I'm actually playing. Other than that, a great game.
  • Jul 29, 2021

    By Lee Cook
    The Hard and Expert levels really test my brain. However, the pop up ads are extremely intrusive which interrupts my train of thought, hence only 4* rating. Otherwise this is an excellent app for all us logic puzzlers
  • Jul 28, 2021

    By Seth Klein
    Before this update I would have rated 5 star. I loved this game until latest update. With latest update they added an ad in the middle of each puzzle which breaks my concentration. An ad before and after each puzzle was and is fine but in the middle of the puzzle doesn't work for me at all. Since I can do the easy puzzles in 2 mins and the hard ones in 7-8 that is a lot of extra ads for me. They keep sugesting using the option to shut off the ads but it costs $2 & change.
  • Jul 28, 2021

    By Charis Lancaster
    The game is great but I am really getting tired of Google turning up the volume on the ads and not giving us a mute button. I understand the needs for the ads but not blowing out our ear drums. Too bad the game would get a 5 but for the headache from the noise.
  • Jul 29, 2021

    By Jenna Khivka Pratt
    Boring. ads that disrupt game, Click wrong 3 times... get punished with an ad.... in the middle of the game, I don't have great clock accuracy so the game treated me like I don't know that 1+2≠5. Ads are totally fine when placed well. This game could've been much better.
  • 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.
  • Jul 30, 2021

    By Anita Weaver
    Was really enjoying playing on a daily basis for a few months BUT, am seriously thinking of deleting now ads interrupt every game mid-flow, annoying, off-putting and adds time. Whoever thought that this was a good idea is mistaken
  • Jul 19, 2021

    By Anne D
    I like being challenged in Sudoku, so I didn't see the point of giving such obvious clues in the sums. Then I tried Expert mode where the whole board starts out blank, and really enjoyed it. But then I found you can just put in any valid board and win. Don't even need to have the correct sums. I just pulled up a complete board on Google and copied the numbers in and then it congratulated me for finishing an expert board in record time.
  • Jul 28, 2021

    By Jenn Anderson
    I have really enjoyed this app & played daily until the last 6 weeks or so, due to a crazy schedule. I come back and find there are now ads during the game play, not just between levels like I was used to & was perfectly fine with. I feel this is infuriating and insulting by the developer. I am trying to beat my best time, & to have it suddenly disappear for an ad, and then reappear with the time ticking, or even some glitch, is not ok!!! I can not just pick up where I left off like nbd.
  • Jul 25, 2021

    By Michael Landblom
    Really challenging on expert and I'll spend lots of time doing the puzzles. My biggest complaint: you get your three wrong then you're required to watch an ad, which half the time won't play and you lose all progress on a puzzle you put 30+ minutes on. There was a lot of times I wanted to uninstall because I was 40 minutes in and then lost all progress. Allow continuation after three wrong without an ad to continue and you'll get more stars.
  • Jul 30, 2021

    By Tamisha Cauley
    1 puzzle 6 ads. Before starting there was an ad. Once started there were no ads for the first 5 minutes. After that there was an ad every 90 seconds. Then another ad after finishing the puzzle. I get the developers need to make money but this is overkill. I uninstalled 20 minutes after installing just because of that.
  • Jul 30, 2021

    By Mark Mayo
    Ads right in the middle of the game! I understand between or to continue after so many mistakes. BUT RIGHT IN THE MIDDLE OF THE GAME!
  • 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.
  • Jul 29, 2021

    By Singing Seagull
    Really enjoy the game, and I understand that ads are a necessary evil to preserve free use of apps, but now that ads pop up IN THE MIDDLE OF GAMES it's killing killer sudoku for those of us who are concentrating and racing against the clock. Would be 5*'s but because of this I can only give 1*. What a crock.
  • Jul 29, 2021

    By A Google user
    its a simple and lovely game fitting my play-style but on god the ads are too much. TOO MUCH. i usually dont mind ads and understand their benefit but to the point where they hinder my game? an ad popping out in-mid my game? i couldn't stand it. deleted.
  • Jul 28, 2021

    By Kelly Cooper
    I have started get ads in the middle or towards the end of a puzzle. This is really annoying and stops my flow of entering numbers. If it continues, I will be uninstalling.
  • Jul 29, 2021

    By luke niemeyer
    Worst app I've used in a long time. You get ads for finishing off a number in your puzzle. You're seriously going to stop me mid puzzle to show me an ad? Absolutely not.
  • Jul 30, 2021

    By Relja Kovačević
    Killing people with ads for small amount of money you are earning from them will make people delete the game, so nobody will watch those commercials. Stop spamming with 1-3 ads in the middle of the game and I will get back to this game!
  • Game disappeared following a “second chance” ad Mar 17, 2021

    By NWILgal
    I am new to this game and have so far played only two daily puzzles. Today was my third, and it was a difficult puzzle that required some guesswork. I hadn’t figured out “notes” yet, and I also just tapped a couple of incorrect digits by mistake. A player is allowed three errors before the game must be restarted or the player must sit through a 30 second ad to get one more chance. I was loathe to restart the game I’d worked on so hard and had watched several ads to continue, so I requested a second chance. The ad ran its course, then my screen reverted to my home page. When I tapped the Killer Sudoku icon, the day’s puzzle appeared, but it had reset to the beginning. Needless to say, I was more than a little disappointed and angered. I understand that watching ads helps pay for the game if I want to play for free, but the developers should hold up their side of that bargain.

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Killer Sudoku by Sudoku.com - Free Number Puzzles

Killer Sudoku by Sudoku.com - Free Number Puzzles