# Sudoku: Classic Brain Puzzle — user reviews > 163 indexed App Store user reviews of Sudoku by UNICO STUDIO, rated 4.70/5 from 1,372 ratings. - Source: https://appshunter.io/ios/app/sudoku-classic-brain-puzzle/id1500326655/reviews - App overview in markdown: https://appshunter.io/ios/app/sudoku-classic-brain-puzzle/id1500326655.md - Rating breakdown: 5★ 1,108 · 4★ 189 · 3★ 13 · 2★ 15 · 1★ 47 ## What do users think of Sudoku? Overall sentiment: negative **Pros** - 👍 Classic gameplay - 💡 Notes feature to distinguish inputs - 💡 Countdown of remaining numbers **Cons** - 🔍 Frequent and disruptive ads during gameplay - 🔍 Ads with inappropriate content - 🐛 Crashes and freezes - 🔍 Loud audio from required ads - 🐛 Sensitive controls leading to mistakes - 🔍 Inability to play without sound **Commonly reported bugs** - Game crashes and freezes - Inability to exit ads without losing progress - Incompatibility with older devices **Most requested features** - Option to pay for ad-free experience - Ability to pause game during ads - Customizable board and UI themes - Improved game mechanics and controls ## Newest reviews (17 of 163) ### 4/5 — Good game, easy functions *2026-07-14* I would give it 5 but the ads…. Which I know are necessary 😵‍💫😊but lolol. I like that it’s easy to play and go from number to notes without mistakes that can be annoying. Have a few sudoku but this is my go to. **Developer response:** Thank you for the thoughtful review and for choosing our game as your go‑to! We know ads can be a bit much; their revenue helps us keep the game free while we improve it. We’ll keep refining the experience so it stays easy, relaxing, and fun to play 🎮🌟 ### 2/5 — No hints *2026-03-07, version 1.2.46* I like this game! But I’m a little disappointed that the hint button doesn’t work. I bought the 10 hints pack and i can’t even use them. ### 4/5 — Really Fun, but… *2026-01-17* The ads that this app shows open pop-up windows to my phone browser that read things like “Your phone has viruses!” and “Unmute your phone to earn your reward.” I enjoy the gameplay, but I would appreciate if the ads were screened or not spammy/dangerous. **Developer response:** Sorry to hear this. Normally it shouldn’t happen. Although we don't have control over the content of the ads which are served by ad networks, we have the ability to block certain ad categories. Please share the screenshot of the ads with us at support@unicostudio.co. ### 3/5 — Ads galore *2025-11-20, version 1.2.46* I understand that a free game will come with ads. I get that. But do not interrupt the flow of the game. Start your ad BEFORE or AFTER the game, not DURING the solve while I am trying to focus. For this sole reason I would not recommend this one. There are plenty others out there. If they change that aspect, it would gain an extra star. But not as is. ### 1/5 — Ads *2025-10-05* This app literally has an ad every minute. For the first 30 minutes it’s fun because the ads only appear after each game or about 7-10 minutes, however the longer you play the more ads play sooner to the point you can’t even play the game for more than a half a second before another ad starts. This is absolutely insane. I’m deleting this app and finding a better one to use. **Developer response:** We regret that you did not like the app, but thanks for the feedback. We are sorry for Ads. Ads between levels are skippable. We will improve in the future and we will try to keep the Ads from interfering ### 1/5 — ポイ活 *2025-09-29* ポイ活の為にインストールしたけど、いつの間にか新しいゲームを押すと落ちるようになった。 容量空きいっぱいあるiPhone15で、このアプリだけ開いてても落ちます。 時間の無駄。 **Developer response:** 私たちのゲームを楽しんでくれてありがとう！遭遇したバグについて聞いてすみません。あなたのレポートは、これらの問題を特定して解決するのに役立ち、ゲームをすべての人にとってよりスムーズにします。私たちはあなたの忍耐とサポートに感謝します。 ### 1/5 — 勝手に消える *2025-09-29* ゲーム途中で勝手にオフになります。1000回超えるのを阻止しているのか。私の携帯が悪いのか。 皆さんが言うように広告多くてストレスです！ **Developer response:** こんにちは、あなたが私たちのアプリで素晴らしい経験をしていないと聞いて申し訳ありません。できるだけ早くこの問題を解決することを約束しています。あなたのフィードバックは私たちにとって不可欠です。お知らせいただきありがとうございます！ ### 2/5 — NSFW Ads *2025-09-26, version 1.2.46* I understand the ads are needed but I'm seeing inappropriate ones......... ### 1/5 — Ads *2025-09-19, version 1.2.46* I understand having ads to maintain the app and all, but seriously? An ad every 20-30 seconds?? And sometimes, your ads would repeat itself right after it ends, looping several times for another 2-4 times or even forever. And after that, the note function was turned off automatically for me. Because of that one messed up, the whole board was messed up, cause the other tiles accepted the answers and remove the options. Horrible when you have limited attempts before you fail and have to restart. Absolutely rubbish ### 2/5 — Impossible to enjoy! *2025-09-18, version 1.2.46* Impossible to enjoy or play due to the 30s ads before and after each game as well as sound (the game forces you to turn up your volume) and video ads every minute mid game. The timer is not stopped when these ads play either. You can pay £5 to play without ads. I would happily play if there was ONE less than 1min add before each game or an ad bar which plays on the edge of the screen which doesn’t interrupt gameplay. The seemingly only other real review here does correctly point out the game mechanics are fine. ### 1/5 — NSFW Ads *2025-09-17* I was already frustrated with the frequency of ads on a simple sudoku app, but I put up with it for a few puzzles. But obtrusive, frequent ads aside, I just uninstalled the app because an ad had an incredibly inappropriate image. There’s no reason for a sudoku app to feature 17+ advertising, especially not without my consent or an option to remove ads like that. I’m lucky I wasn’t sitting next to a child while I solved a number puzzle, do better. **Developer response:** Sorry to hear this. Normally it shouldn’t happen. Although we don't have control over the content of the ads which are served by ad networks, we have the ability to block certain ad categories. Please share the screenshot of the ads with us at support@unicostudio.co. ### 3/5 — Expert is impossible *2025-09-07, version 1.2.46* How… how are you supposed to beat expert mode in 1 minute… ### 1/5 — DALGA MI GEÇİYORSUNUZ? *2025-08-31, version 1.2.46* Oyunu oynarken, oyuna odaklanmışken falan çat diye ekranın ortasına kocaman “reklam izle” ve “reklamı kaldır” diye bir bildirim geliyor. Bu bildirimden çıkamıyorsunuz, mecburi ya reklam izlemeniz gerekiyor ya da para verip reklamı kaldırmak. Bildirimin üstünde “bizi desteklemek için…” şeklinde abuk subuk saçma sapan bir yazı hahaha şaka mısınız yahu siz! Boş yere indirmeyin. ### 1/5 — Mauvaise jouabilite *2025-07-21, version 1.2.46* Trop de pubs, et la jouabilité qui fait qu’on place trop souvent un chiffre qu’on ne voulait pas, ce qui nous fait perdre, et ré-regarder des publicités. ### 1/5 — Insuportável *2025-07-03, version 1.2.46* O jogo é muito bom claro funciona e tudo mas é impossivel jogar quando aparece comercial a cada 5 segundos e é sempre o mesmo comercial SEMPRE O MESMO SE FOSSE DIFERENTE EU ENTENDERIA MAS A CADA SEGUNDO TEM UM COMERCIAL REPETIDO EU NÃO CONSIGO NEM JOGAR DIREITO É INSUPORTÁVEL APARECEU 5 CINCO CINCO, CINCO COMERCIAIS TODOS REPETIDOS DA MESMA DROGA E EU TINHA QUE ESPERAR E VER O MESMO COMERCIAL CINCO VEZES PRA CONSEGUIR JOGAR ### 4/5 — Publi *2025-06-08, version 1.2.46* Me encanta la aplicación, odio la publicidad ### 2/5 — keeps kicking me out *2025-05-08, version 1.2.46* this game keeps kicking me out when i start to play and i can’t play music with the app either ## Most critical reviews (10 lowest-rated) ### 1/5 — 落ち着いて出来ない *2026-08-06* 500円課金しても3回タップ間違えしたら公告見てみたいな仕組み。しかもとってもしつこい公告。タブレットだからふと触ってしまったりすることもあるしホント嫌な仕組み。 ### 1/5 — 広告 *2026-03-22, version 1.2.46* 長い広告を閉じた後、1秒くらいで閉じれる広告が3回出てくる。 ### 1/5 — 광고에 미친 게임 *2026-03-10* 광고도 적당히 나와야 게임을 하지 누구나 만들수있는 스도쿠 어플에 광고만 덕지덕지 **Developer response:** 여기요! 우리 앱을 확인하고 피드백을 제공해 주셔서 진심으로 감사드립니다. 광고 균형에 대한 귀하의 의견을 이해합니다. 우리의 목표는 개발을 지원하면서 게임에 대한 접근성을 유지하는 것입니다. 우리는 곧 더 나은 경험을 제공하기 위해 광고 빈도를 최적화하기 위해 노력하고 있습니다. 우리와 함께해주셔서 감사합니다! 지원 이메일은 support@unicostudio.co입니다. ### 1/5 — 廣告真的太多 *2026-02-15, version 1.2.46* 能理解免費遊戲多多少少有些廣告正常，但我一局都還沒玩完就跳廣告？讓人很煩躁 ### 1/5 — Too many ads- most XXX *2026-02-06, version 1.2.46* My problem with this game is the ads- ad when you pause a game, an ad every 4 minutes during the game & an ad when you win a game. Not only is that too many ads, but they are gross. STOP SHOWING DISGUSTING “GALATEA” BEASTIALITY PORN ADS!!! I see both of these issues mentioned in other reviews going back 6 months are addressed by you so you’re both aware & have had time to address if you cared to. I know ad revenue makes the game possible but how much are you making off those players deleting the game BECAUSE of the ad frequency. Before & after a game (while excessive) is understandable, but during the game is disrespectful to the player as it interrupts your concentration & overall enjoyment of the game. If your current ad network doesn’t allow for control over ad content, find a new ad network! Remember that everything a player encounters while interacting with your product represents you! If you are fine being associated with porn where humans are copulating with wolves and dragons then by all means continue passively standing by but change your age rating from the 4+ years that is currently being promoted!!! ### 1/5 — Why *2025-12-23, version 1.2.46* Fnck ### 1/5 — Easy to make mistakes; insist that you have volume on. Super loud. *2025-12-10* Yeah, I played two puzzles and just uninstalled it. There is too much clicking in and out of cells required. You’re only allowed three mistakes before you’re kicked out of the puzzle, but with the weird need to click on an inactive marked cell before filling in a blank cell, it’s easy to overwrite your correct answer. Then there’s the requirement to have your phone unmuted. That means you can NEVER play it in a room with another person or play it while watching tv. You have to listen to the ads and at full volume (if you turn it down, you’re told to turn it back up). It is LOUD. Upsettingly loud. Worst sudoku app I’ve tried. **Developer response:** Hello there thanks for sharing a detailed review! Your support is awesome. We totally get your frustration and are working hard to fine-tune controls and ad audio issues. Please reach out to support@unicostudio.co if you have more tips. Appreciate you! ### 1/5 — Too many ads *2025-10-24, version 1.2.46* While I support ads for free products, having ads show up *during* a game is way too obtrusive. Look elsewhere for sudoku. ### 1/5 — Too many ads *2025-10-19, version 1.2.46* This app shows you adds mid game and it’s so annoying ### 1/5 — Demasiados anuncios *2025-10-15, version 1.2.46* Es muy buen juego, podría pasarme mucho tiempo resolviendo sudokus, pero tiene demasiados anuncios. Es un anuncio antes de jugar, decenas mientras juegas, y otro al finalizar. Oh, y si tienes que salir de la app para ver algo o responder algún mensaje, al volver tienes otro anuncio aunque acabaras de ver uno. La verdad es que se vuelve muy molesto e injugable. Yo entiendo que los pongan al finalizar y comenzar uno, ¿pero durante? Es pasarse, si pueden descarguen otros. Hay mejores opciones. ## Most praised reviews (10 highest-rated) ### 5/5 — 頭の中 *2026-01-20* 中々難しい😓けど頭の中が凄く回転しているので出来た時スッキリします。 ### 5/5 — ShellO *2025-12-23, version 1.2.46* Classic! ### 5/5 — i love this game, but that ad.. *2025-07-25* i’ve been playing this game for a month now, and i’ve never had any issues whatsoever with it. however, just now, the game refused to let me exit out of an ad and i lost all my progress. the game itself is completely gone, and i was so close to finishing it. this made mad me really mad, and i just want to continue that singular game. **Developer response:** Thank you for the 5 stars! We're really sorry to hear about your lost progress due to the ad issue. Please contact support@unicostudio.co and we'll assist you in restoring your game. Your feedback helps us improve! 🎯🙋 ### 5/5 — Excelente juego, mantiene activa tu mente *2024-07-23, version 1.2.39* Magnífico ### 5/5 — Çok Güzel Bir Oyun *2024-02-28, version 1.2.35* Bu oyunu Who İs oynadıktan sonra yükledim, çok güzel bir oyun. Zekamı geliştiriyor,, ama Who is oyunundaki bütün Levelları tamamladım yenileri ne zaman gelir? ### 5/5 — Trò chơi rèn luyện trí não *2024-02-08, version 1.2.35* Trò chơi này rèn luyện trí não và rất vui ### 5/5 — hảo=) *2023-11-01, version 1.2.18* t thật sự ko biết chơi trò này(nhưng vẫn đánh giá 5*=) ### 5/5 — Review *2023-10-24, version 1.2.18* Nice game I enjoyed it ### 5/5 — Muito bom ajuda a desenvolver o conhecimento *2023-08-09, version 1.2.18* Amei ❤️❤️ ### 5/5 — Challenging and Mind-blowing *2023-07-06, version 1.2.18* This game is really challenging, with different levels or difficulties. I must say that it is worth it and a more resourceful way of spending your free time. Enjoy! --- *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 2026-08-31.*