# Sudoku - Classic brain teaser — The definitive logic puzzle > Classic Sudoku number puzzle game with customizable difficulty and themes. (iPhone/iPad app by Quarzo Apps.) - Source: https://appshunter.io/ios/app/sudoku-classic-brain-teaser/id1444730067 (this page in markdown: same URL + `.md`) - Developer: [Quarzo Apps](https://appshunter.io/developer/1441517949) - Category: Games, Board, Puzzle - Price: Free with in-app purchases - Rating: 2.00/5 from 1 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 15.0 · 45 MB - Languages: American English, European Spanish - Released: 2018-11-30 - Data updated: 2026-08-15 - Monetization: free with in-app purchases - User reviews in markdown: https://appshunter.io/ios/app/sudoku-classic-brain-teaser/id1444730067/reviews.md ## What is Sudoku? Welcome to the classic brain teaser game! To solve the game you must complete the puzzle by filling in all the numbers (from 1 to 9) so that each digit does not repeat in the same row, column or block. This app will become your favorite Sudoku game. WAIT!, THERE'S MORE! Includes cool color themes, with a night mode theme. You can also change the letter font. Win trophies by solving each daily sudokus. Customize the game UI depending on your expertise [ HIGHLIGHTS ] - Minimalist, simple and fun game, suitable for children and adults. - 7 difficulty levels - Many customizable options and aids - Full game is free, with very few ads (no ads while playing) - Exercise your brain and relax solving suokus! - Beautiful and simple user interface (portrait and landscape) - Includes sounds (can be disabled) and HD interface - Infinite Sudoku generator [ DIFFICULTY LEVELS ] 1 - Very easy : Suited for children or people learning how to solve Sudoku. 2 - Easy : Recent studies show that playing Sudoku helps elderly people memory. Just do it! 3 - Intermediate : You will be able to finish Intermediate level games using basic techniques: Hidden singles and Naked singles. 4 - Hard : This puzzles need to use some intermediate techniques: Pointing pairs, Naked pairs, etc. 5 - Expert : This are intended for advanced players that can combine many intermediate strategies. 6 - Extreme : To solve this grade puzzles you'll need to use some advanced strategies: X-Wing, Y-Wing, Swordfish, etc. 7 - Nightmare: Only pro players will be able to finish this games. This is a real challenge. Maybe you'll need some luck to solve it :) 8 - Grandmaster: This are considered the hardest sudoku to complete. Will you be able to succeed? All Sudoku have only ONE possible solution. Just one more thing... ENJOY !!! -------------------- Any suggestion or bug report is welcome. Please, before writing a bad review contact us by email at hola@quarzoapps.com ## Key features - Fill grids with numbers 1-9 - No repeats in rows, columns, or blocks - 7 difficulty levels - Customizable color themes and fonts - Daily Sudoku challenges - Infinite Sudoku generator - Minimalist and simple UI ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | NoAds | $4.99 | one-time | ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/sudoku-classic-brain-teaser/id1444730067/reviews.md ### 1/5 — Información Falsa y errónea *2022-08-05, version 1.2.2* Inservible e inutil ### 4/5 — Quitar publi? *2021-04-23, version 1.1.9* Estaría muy bien si se pudiera quitar la publicidad. Pagué y cada vez que lo abro tengo que restaurar compras para quitarla. Reembolso al canto. ### 5/5 — SUDOKU PAPEL *2021-01-21, version 1.1.2* Hola me gustaría preguntaros si puedo añadir un sudoku de un periódico o revista porqué siempre los hago gracias ### 5/5 — Perfecta *2020-05-18, version 1.1.2* Ideal si en el sudoku diario dijera algo como ... “mejor tiempo 4:44”, “tiempo medio 7:00”, “Tu tiempo 6:00” Mejor aún con enlaces a tutorial es avanzados de solución sudokus Salud ### 1/5 — Fraude *2019-02-15, version 1.1.2* Es un fraude, la compre para evitar los molestos anuncios, pero siguen apareciendo, no se vale. ## Frequently asked questions about Sudoku ### What is Sudoku? Sudoku is a logic-based number-placement puzzle. The objective is to fill a 9x9 grid with digits so that each column, each row, and each of the nine 3x3 subgrids that compose the grid contain all of the digits from 1 to 9. ### What are the difficulty levels in Sudoku? Sudoku offers 8 difficulty levels, ranging from 'Very Easy' suitable for children and beginners, up to 'Grandmaster' for professional players. This allows players to progress as their skills improve. ### Can I customize the appearance of Sudoku? Yes, Sudoku features cool color themes, including a night mode, and allows you to change the letter font. The user interface is also customizable depending on your expertise. ### Does Sudoku have ads? Sudoku contains very few ads, and importantly, there are no ads displayed while actively playing the game. This ensures an uninterrupted puzzle-solving experience. ### Is Sudoku available offline? The description does not explicitly state offline play, but as a single-player puzzle game, it is highly likely to be playable without an internet connection once downloaded. ### How often is Sudoku updated? The app was last updated on June 26, 2025, indicating active development and support. Updates typically include bug fixes and new features. ### What devices support Sudoku? Sudoku is supported on iPhone, iPad, and iPod devices. It features a beautiful and simple user interface that works in both portrait and landscape modes. ### Is Sudoku suitable for children? Yes, Sudoku is described as a minimalist, simple, and fun game suitable for children and adults. The 'Very Easy' difficulty level is specifically designed for those learning how to solve Sudoku. ## Version history (last 5 releases) ### 1.3.4 — 2025-06-26 Bugfixes and visual improvements. ### 1.2.7 — 2024-01-15 Visual improvements and bugfixes. ### 1.2.4 — 2022-11-22 - Fixed Premium mode - Visual improvements and bugfixes ### 1.2.2 — 2022-01-20 - NEW: Now you can color the candidate numbers, for techniques like "Medusa 3D". - Support for new devices. - Fixed a bug on Premium app sometimes showing ads. - Bugfixes aand some minor improvements! ### 1.1.9 — 2021-03-02 - Reduced size - Sudoku editor. - New difficulty Level : 8 Grand Master. - New language: French. - Pause button. - Many new improvements and cool features! ## Apps similar to Sudoku | App | Rating | Price | Category | | --- | --- | --- | --- | | [Sudoku - Brain Number Games](https://appshunter.io/ios/app/sudoku-brain-number-games/id6449618005) | — | Free | Games | | [Sudoku - Classic Puzzle Games.](https://appshunter.io/ios/app/sudoku-classic-puzzle-games/id1624333551) | 4.7 (460) | Free | Games | | [Memotwo - Find matching cards](https://appshunter.io/ios/app/memotwo-find-matching-cards/id6741576864) | 5.0 (1) | Free | Games | | [Sudoku Classic: Number Puzzles](https://appshunter.io/ios/app/sudoku-classic-number-puzzles/id6443815428) | 4.8 (379) | Free | Games | | [Sudoku - Numbers Games](https://appshunter.io/ios/app/sudoku-numbers-games/id6452273434) | — | Free | Games | | [Killer Sudoku by Logic Wiz](https://appshunter.io/ios/app/killer-sudoku-by-logic-wiz/id1641151077) | 4.9 (185) | Free | Games | ## More apps by Quarzo Apps - [4 in row classic](https://appshunter.io/ios/app/4-in-row-classic/id1441517950) - [Solitaire pack (Spanish cards)](https://appshunter.io/ios/app/solitaire-pack-spanish-cards/id1442198518) - [Crucigramas clásicos](https://appshunter.io/ios/app/crucigramas-clasicos/id1450975436) - [Hangman game - Guess the word](https://appshunter.io/ios/app/hangman-game-guess-the-word/id1453292738) - [Word Architect](https://appshunter.io/ios/app/word-architect/id1457322120) All apps by Quarzo Apps: https://appshunter.io/developer/1441517949 --- *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 2026-08-15.*