I love the game, the app, and the puzzles. I just wish there were two features. One, the ability to cross out the sum possibilities. This would help tremendously to visualize things better, especially for the hard puzzles. Two, I wish I could scroll the selected square with my thumb on the blank area of the app (I have a Galaxy 10+, which makes it a really big reach for the squares up top lol)

So far, I am enjoying these Sumsudoko puzzles. I am able to check my answer placements, correct, pause, and finished each puzzle.

Good Killer Sudoku App. The missing 5th star could be gained if they included a way to 'cross out' the possibilities as you eliminate them. Over all fun and free, and the puzzles I've done so far are well designed. Edit: Update includes the ruling out of possible cages and earned the 5th star. To the Devs: Any plans to introduce 'packs' of levels? For example including an Easy, Medium, hard and killer? etc for a bundled price?

I would rate this game with 5 stars but there's only a minor thing that's in the way, the screen goes to sleep after a few seconds and I constantly have to touch it to keep it going. Such a small thing but so annoying. Can you add a feature to select whether you want the screen indefinitely on or not? Other than that this app is great and it's the best killer sudoku app I've found. That's why I paid for a pack of sudokus after I exhausted the free content. Hands down recommended!

Quite good and challenging on v.hard level, would like to be able to group select multiple cells to make changes rather than poke each cell individually .

Emjoyed the added feature of math to take sudoku into a new more creative direction. Try it--you may like it! I did! Ksnflwr

Great game. It has a amazing help option that tells you all the combos of numbers possible to add to a given number.

This is a fun game, but I wish there were more free puzzles. There are 3 difficulty levels, and you get 30 puzzles for each level, plus a weekly puzzle, & can buy more. One big issue I have is - I use game launcher & for the last few days, this game is ALWAYS shown as my most recent played game, and shows I've played it for all 24 hours of the day - even if I havent opened the game at all. That can't be good for my battery or data - will be uninstalling due to this.

Ok. Very few of these games on the play store . A shame because I like it, good maths work and strategy. Keying a bit fiddly. Pencilled numbers are TINY on my phone screen, so this is better suited to a larger tablet screen.

I play this on my tablet (2 in 1 laptop). It is a great interface, giving you all kinds of options making a pen and paper obsolete. I used play sumdoku on paper, but this is so much easier. Probably the best constucted puzzle app I have played. If you like sumdoku, you have to play this one.....you won't be sorry.

This is a great little free app. The easy and middle levels are fairly easy. I would like an autofill option for pencil marks but heigh ho, its a free app and i love it.

Great app. Much more interesting and challenging than regular Sudoku. One suggestion...allow a player to select and "grey out" specific sum combinations once they've been eliminated as a possibility.

Enjoyable math, mind, and thinking game. Only thing i could suggest is for the beginners too have a button to click if they wanted to put all the "pencilmarks" in at the start to help use process of elimination, overall a good game to keep ur brain sharp.

I've enjoyed solving this puzzle on paper for years, which is better than using this app. The possibilities listed for the sum do not change, even when there is a partial answer entered, unlike the other Conceptis puzzle apps.

Straight forward Killer Sudoku, easy to use, I love it, so far. I have only been using it a few days... 3 levels, the easiest is quite straight forward, medium makes you think, haven't tried the hardest level yet! Brilliant find...

Brilliant, and brain achingly addictive. Only thing that could make it better? More puzzles, a grid layout for answer options and an auto fill button (to fill cells with all possible answers, that you then delete as appropriate)

I have always loved Sumdoku puzzles and this is a great app for it. It has every feature you need. I highly recommend!

I do sudoku on a phone so the screen is small and size and clarity really matter. I've given up on some others but this one rates high and I'm so pleased as the Sum doku is much more fun than the basic one. So far I've only done a few easy ones while I 'get my eye back in' but really looking forward to being properly challenged.

Fun and interesting sudoku game. There are 90 free levels to play, anything after that is paid for content. Biggest con is that the price for the amount of content is too high, personally, I believe more free levels should be released in between multiple paid levels to entice longer play and player retention.

Pressing "back" to the list of puzzles can erase the progress. Inexcusable. P.S. Most likely it coincide with crashes. Sometimes simply rotating the screen may do it.

Great game. Would be nice if there was an option to reset the game. As it is, after all free games are played, you have to either uninstall and reinstall or reset each game individually.

Fun and entertaining from easy to super difficult. A great way to pass time. Great way to enhance your mental skills.

The new feature enabling crossing out wrong solutions makes this game so much better. Kudos to the developer for responding to feedback. The "Very Hard (Killer)" puzzles are not always hard at all. I have solved some in 10 minutes and many in under 20 minutes. I am quite slow and a genuinely hard puzzle takes me an hour or more. There is a flaw in the way these puzzles are being graded. Also the Very Hard puzzles are never included in the free weekly puzzles.

Very fun game. Love the challenge. Wish there were more games as fun and challenging. Have enjoyed this game for years from the book form. Glad to have found this app. Thank you.

I've played many Sudoku games and this is my current favorite, containing the elements needed to prevent dementia.

One of my favorite games by Conceptis. There could be more free content (especially the killer difficulty is missing) or bundle sales (as the cumulative price of the whole content is way overpriced).

this game is super addicting and I play it daily! I had a difficult time finding something similar once I exhausted the free levels, so I paid the $1.99/difficulty and it was a very good purchase. it keeps my mind going and my brain working. I can start a puzzle and finish later bc it auto saves.

I love this game. But in possible sum combination, i miss manual shadowing choosed combination. When I'm sure that some combinations are impossible, I'd like to shadow them.

I think the game would be improved if pencilled-in options were sensitive to conflicts. Even with the conflict option switched on they are not. Otherwise, very enjoyable, and the absence of ads during play is extremely welcome. In some other killer sudoku offerings, the ads are frequent, intrusive and unethical (e.g. promoting gambling).

I really like this app. Normally, I don't even have to use pencil marks until Expert on normal sudoku; but, this game is so challenging I have to use pencil marks on beginner<3. They added the feature where you can cross out possible cage groups in omega(looks like a 3) and I love it! I've played numerous regular sudoku apps and sum sudoku apps. The omega button plus all the other ways to select and highlight make this THE BEST SUM SUDOKU I've ever played.

Quite good and challenging on v.hard level, would like to be able to group select multiple cells to make changes rather than poke each cell individually.

I love Sudoku and Kakuro; what an amazing way to combine them together! I feel like I'm pretty proficient at both of the afore mentioned games, but mashing them up like this has really added a new layer of complexity which I love even more. The tools available to track and identify possibilities are incredibly helpful. However, as many others have noted, being able to cross off known combinations that are not possible would definitely improve the game even further. Well done, Conceptis!

Probably the most fun sudoku type app out there! Except the buttons are extremely uncomfortable to reach with one hand with a tall phone (Samsung Galaxy s20+). Please make it so we can get to the buttons at the bottom of the puzzle rather than the bottom of the screen.

I was all excited when I saw there was an update, but there is still no ability to cross out possibilities from the list. 🙁 This is a serious deficiency as it means, at the very least, you need a pen and paper to hand to write down the viable options, or you can't solve the harder puzzles.

I really like doing the SumSudku. It engages more of my brain than a standard Suduku without being too taxing.

The ability to select multiple squares for pencil would greatly improve this game. Also the ability to cross out various option on the sums page.

Great intuitive design. Reasonable prices for additional games. No annoying ads. I enjoy all the conceptis games I've downloaded

Love it. I've dropped over 300 hours in the last year on SumSudoku. I do have a minor wish list: -Ability to have calculator for arbitrary sums -Ability to select cells and note what they must sum too (ex, I've figured out cells X and Y must sum to 11, so I'd like to be able to note that) -Ability to strikethrough sums that I know are impossible (ex. I know this cage of 4 sums to 20, but I know it's not possible to have a 9. I'd like to be able to strikethrough all the sum possibilities in the calculator that have a 9)

Gear interface, I've experienced no problems or obtrusive advertisements. I recommend this without reservation if you enjoy puzzles.

Just the right amount of automatic changes occur. You can still make some mistakes and have to discover them yourself, but it cleans up your notes as you use numbers. It even let's you back up and restore changes. Very reliable - I haven't encountered any glitches.

I really like this app. I've played numerous regular sudoku apps & the only thing I would change is that when you placed a final number on a square, it would highlight all of those numbers instead of only when you touched one that was already placed. My ADHD gets in the way when playing & I forget my pencil marks in other squares when placing. Normally, I don't even have to use pencil marks until Expert on normal sudoku; but, this game is so challenging I have to use pencil marks on beginner<3.

It's alright. It would be better if you could strike out solution sets and if there was an in app calculator

This is a great game. I love the pencil option and being able to check for errors. I've finished all the free volumes twice and considered buying more but I can't figure out how to do it.

If you like Killer Sodoku then you'll love this app. A choice of varying levels of difficulty with some helpful tools. Great job.

Love this version of Sudoku, needs to have many more and possibly a daily challenge, not a weekly one

this game is super addicting and I play it daily! been playing for 8 mos now and still looove it!!! I had a difficult time finding something similar once I exhausted the free levels, so I paid the $1.99/difficulty and it was a very good purchase. it keeps my mind going and my brain working. I can start a puzzle and finish later bc it auto saves.

Conceptis makes the best apps for Sudoku games! They are fairly priced and feature rich. I have tried a ton and this one just works the best. .-- UPDATE They have come up with even better features for tracking your progress. You can now track which sets work and don't work in each set of cages sums now. I had been thinking of asking for this feature and they beat me to it. BEST SUDOKU APP BY FAR!

I liked what I played but the add ons are far too expensive. I have a straight Kakuro game in which I paid a single fee of about £3 for 1000 games - that would cost around £50 in this one. No thanks.

Great challenge! I wish I could pay for all of them. This is the best Sudoku app I've seen ever and have enjoyed the challenges every step of the way. Keep up the good work y'all.

Good Killer Sudoku App. The missing 5th star could be gained if they included a way to 'cross out' the possibilities as you eliminate them. Over all fun and free, and the puzzles I've done so far are well designed.

Like this game, easy to play and navigate. One of my favourites at the moment. It would be good if you could cross through sum combinations to easily ignore them. This was one of the better features of a previous game I played.

Good app so far, great sudoku variant. Thanks for the game. UI could be cleaner, would like option for center notes. However these are minor and app works great overall.