# SumSudoku: Killer Sudoku — user reviews > 236 indexed App Store user reviews of SumSudoku by Conceptis Ltd., rated 4.80/5 from 801 ratings. - Source: https://appshunter.io/ios/app/sumsudoku-killer-sudoku/id1259275580/reviews - App overview in markdown: https://appshunter.io/ios/app/sumsudoku-killer-sudoku/id1259275580.md - Rating breakdown: 5★ 709 · 4★ 69 · 3★ 14 · 2★ 3 · 1★ 6 ## What do users think of SumSudoku? Overall sentiment: positive **Pros** - 👍 Challenging and fun puzzles - 🚀 Intuitive interface and controls - 🔒 No ads or in-app purchases - 💡 Variety of difficulty levels - 👍 Helps keep the mind sharp **Cons** - 🐛 Occasional crashes or freezes - 💡 Difficulty levels not always consistent - 💡 Lack of customization options (colors, etc.) **Commonly reported bugs** - Some puzzles have incorrect sums or repeated numbers - Autofill feature doesn't always work as expected **Most requested features** - Add ability to select difficulty level for weekly bonus puzzles - Implement a 'dark mode' option - Allow users to cross out/eliminate number possibilities - Add a 'one-tap' feature to fill in all 9 numbers in a cell ## Newest reviews (15 of 236) ### 5/5 — 面白い *2025-10-01* 暇つぶしにぴったり 夢中になりそうなのが難点 ### 5/5 — Suggestion *2025-09-23, version 3.1* Have the ability to copy numbers from one cell to the next (since deductive reasoning is so prevalent in this game) ### 5/5 — 使い易いし面白い！ *2025-09-23* 他のキラーナンプレに比べて使い易いし、ヒントも適切で凄く面白い！ 煩わしい広告も無いし 最高のキラーナンプレです みんなにオススメです ### 5/5 — Love this game! *2025-03-09, version 2.9* Always fun, love the weekly bonuses! ### 5/5 — Great developer of truly ad-free logic puzzles *2024-12-23, version 2.9* I’ve never been disappointed by an app from this developer. Clean, functional, and good in-play instruction and guidance. Highly recommend. ### 5/5 — Excellent *2024-11-10, version 2.8* A most refreshing though provoking puzzle! Totally logical! Most enjoyable! 😃 ### 5/5 — Very enjoyable game! *2024-08-04, version 2.8* I love this game, takes some time to solve but this is the beauty of it, making my heart peaceful. One function I wish it had was the number of sum is bigger or can be zoomed to see better. ### 5/5 — Almost perfect…. *2024-08-01, version 2.8* Please add the ability to change the colors! The tan grid lines are very difficult to see. Like several other reviewers have mentioned, it would also be nice to be able to add all 9 notes to the blank cells at one time. Other than those two requests,I am very impressed with the app. It is fun, challenging, and works flawlessly! ### 4/5 — 別アプリから引っ越してきました。 *2024-07-21* 広告が激増して、終わるのを待ってる間に寝落ちが増えたので。 そのうえ、再生トラブルで進めないことも多発し、さらには機能を減らす改悪も実行。 削除した時に、清々しました。 こちらはシステムに不慣れですが、今のところ不満はありません。 このまま楽しみたいと願うばかりです。 ### 4/5 — Good game but feature missing *2024-07-04, version 2.7* This is a good app, but we need to be able to tap once and drag across the notes number pad to add multiple numbers to a cell at once, rather than having to tap each number separately. As is, it's very inefficient and irritating. ### 5/5 — 画面が拡大できない *2023-12-09* 老眼にはつらい **Developer response:** zoom機能を将来追加する予定でおります。只今他の優先事項の作業が多々あり、暫くお待たせしてしまうかと思いますが、、ご意見ありがとうございます。 ### 5/5 — My Favorite *2023-11-28, version 2.6* This variety of Conceptis puzzle is my absolute favorite. I enjoy every minute I spend, and I spend a lot! Don’t like the new color schemes. Even turning off black mode. There’s no distinguishing between completed sets and non completed sets, and the different grays now less appealing and harder to differentiate. ### 5/5 — Mi piace *2023-11-19, version 2.5* Finalmente una bella applicazione, ci sono varie difficoltà, qualli hard sono veramente impegnativi. Sono contenta ### 5/5 — Best Sudoku game I’ve ever played *2023-11-12, version 2.5* The best ### 5/5 — これぞ決定版 *2023-11-06* 広告がまったくなく、操作性も優れ、問題の質も高い、まさに非の打ち所がない作品。このジャンルの決定版、最高峰と言って良い。 ## Most critical reviews (10 lowest-rated) ### 1/5 — Swipe for sum *2026-04-01, version 3.3* Bring back the swipe for sum feature. ### 1/5 — Same problem as most Conceptis games *2023-07-15, version 2.5* It never stops asking you to rate/review it. Never. Among the 6 Conceptis apps I have, I’ve had to hit “No” well over 100 times. Every single time they update it and then some. Edit: it asked again Edit 2: it asked again Edit 3: it asked again Edit 4: it asked again Edit 5: it asked again ### 1/5 — Don’t like the new border *2023-06-23, version 2.5* The new border around each asymmetrical 9-numbered section…It’s too much. What was wrong with the border thickness before? ### 1/5 — Pieno di errori *2023-02-26, version 2.4* Ho provato uno schema difficile. Era pieno di errori. Le somme scritte sui campi non corrispondevano alle somme dei numeri che ne facevano parte. Alcuni numeri addirittura si ripetevano sulla stessa riga. ### 1/5 — Don't bug me for ratings *2022-09-24, version 2.2* Don't bug me for ratings. ### 2/5 — Assistant Feature not always helpful *2026-04-03, version 3.3* I’ve been using this app for some time, and have always found it very good. The new Assistant feature is a useful addition if you are really stuck, but it relies on you using the Auto-fill feature. If I have carefully filled in the possibilities in small digits, then get stuck and turn on Auto-fill, it will sometimes add additional “possibilities”, that I have already deduced are “impossibilities”. e.g. If I know that the number 1 can only be in row 3 within a certain cell, Auto-fill will add the number 1 to row 3 in other cells on that level, if there are no other constraints … do I then need to remove them again manually! (This bug also exists in the Auto-fill feature in Multi-Sudoku) Updated 28 March 2023. Thanks for the feedback on my previous comments! My next comment is that I wish there was a “help” feature for the different types of hint the Assistant produces. Most I understand … but e.g. for “Sum Area Combinations” I wish it could step me through how it arrived at the conclusion, so I can learn for myself to apply that next time. 03 April 2026 The latest update seems to have lost the ability to highlight an area and see what the number combinations are for that area. This makes the game almost unplayable. ### 3/5 — アプデがイマイチ *2026-04-05* 長年楽しんでるアプリ。無料でも買っても楽しめる。しかし、アプデでせっかくの操作性と視認性の良さが失われました。数字ボタンの色が紛らわしく、拡大も必要なかった。他のより群を抜いて良かったのに。アプデするんじゃなかった。 **Developer response:** 申し訳ありませんでした。その後、改善版をアップしました。 ### 3/5 — Mostly impossible to solve, *2025-12-08, version 3.2* If the puzzle only has 3 numbers it is not worth the effort to solve. Anything greater than very easy has 4 or less numbers to start. I want a challenge that is fun, not make me learn new curse words and phrases. ### 3/5 — 難しい *2023-01-04, version 2.3* 時間がかかるが、面白い。 ### 4/5 — 色々と元に戻った👍 *2026-04-13* 対応ありがとうございます😊 **Developer response:** レビューいただきありがとうございます。最近のアップデートでzoom機能等を盛り込んだため、Σでしか数字のヒントが見れなくなり申し訳ございません。只今諸々修正作業をしております。 修正作業が終わりましたので、スワイプで数字のコンビネーションを表示いただけます。お試しいただけましたら幸いです。 ## Most praised reviews (10 highest-rated) ### 5/5 — 最高 *2026-07-06* 面白すぎて時間が溶けます！ ### 5/5 — おもしろい *2026-06-16* やりがいがあります。広告が無いのがいい。 ### 5/5 — 夢中になっています *2026-06-09* 毎日楽しくプレイしています。広告が出なくて軽いし、機能もとても使いやすいです。上級のパズルが解けた時は至上の快感！元々基本無料なのに、ウィークリーボーナスでパズルが配信されるのもお得すぎていいのかな？と思ってしまうくらいです。これからもたくさん楽しませていただきます！ ### 5/5 — アプデありがとうございます *2026-04-20* 毎日のようにあそんでいます。数あるパズルアプリの中でこちらの会社のアプリはどれも操作性の良さ、無料で遊べる数、複数の難易度、良価格帯、無広告…と群を抜いています。 **Developer response:** レビューいただきありがとうございます。最近のアップデートでzoom機能等を盛り込み、フリックで数字のヒントが見れなくなり申し訳ございません。只今諸々修正作業をしております。数字のコンビネーションはキーパッドのΣで表示されますのでお試しください。 ### 5/5 — The swipe issue has been fixed! *2026-04-12, version 3.4* Thanks for adding back the swipe feature. Now this is the best SumSudoku app in the App Store. ### 5/5 — とても楽しんでいます *2026-04-10* こちらは中級が丁度よくプレイしています。ウィークリーボーナスも有り難いです。それからスワイプ表示の不具合修正ありがとうございました。 ### 5/5 — Love it, but feature removed *2026-03-23, version 3.3* Great game, why did the finger drag on a box to view the number combos get removed?? Please add back - this was what made this app better than other similar ones ### 5/5 — ナンプレ大好き *2025-12-15* ナンプレが大好きです。解ける時間を短くしていくのが好きで、何度もトライしていますが、キラーはお試しがないので購入していません。あると嬉しいな😆 ### 5/5 — It helps me keep my mind sharp *2025-11-12, version 3.2* Also helps with focus. I would suggest you send out some xtra hard games with the free weekly games ### 5/5 — 広告なし！ *2025-11-07* とにかく広告がないのが最高！そして、電波が届かないところでも遊べる！ --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-11.*