# OkuDoku Number Brain Challenge — Fun New IQ Board Puzzle Game > A puzzle game combining Sudoku and Tetris mechanics with block placement. (iPhone/iPad app by Pawel Kieczko.) - Source: https://appshunter.io/ios/app/okudoku-number-brain-challenge/id1514940326 (this page in markdown: same URL + `.md`) - Developer: [Pawel Kieczko](https://appshunter.io/developer/1498102835) - Category: Games, Productivity, Board, Puzzle - Price: Free - Rating: 4.80/5 from 81 App Store ratings · 5 written reviews indexed - Age rating: 4+ - Requires: iOS 13.0 · 10 MB - Languages: Russian, American English - Released: 2020-06-26 - Data updated: 2026-08-18 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/okudoku-number-brain-challenge/id1514940326/reviews.md ## What is OkuDoku Number Brain Challenge? OkuDoku is a combination of 2 classic games Sudoku and Tetris. We have taken all the best from two favourite games to create a truly challenging experience for puzzle lovers. You can play against yourself by beating your own high score or compete in Daily Challenges. The game is easy to play but in order to complete Daily Challenges and get a really high score, you will need to plan your moves a few steps ahead. How to play: 1. Drag and drop blocks with numbers on the board 2. Build lines or squares that contain numbers from 1 to 4 3. You score every time you complete a line or a square with all numbers from 1 to 4 4. Lines and squares get cleared once all the numbers from 1 to 4 are added 5. Plan your moves to combine multiple lines and squares in order to get even higher score 6. Game ends when you don’t have any available moves left Daily Challenge: - Every day we release a new challenge for you to play - Challenge is started with a predefined set of numbers on the board - The goal is reach a target score and not to run out of moves too quickly Please don’t forget to leave a review with your feedback & suggestions, so we can make our game even better! ## Key features - Combine Sudoku and Tetris gameplay - Drag and drop numbered blocks - Score by completing lines and squares - Plan moves for high scores - Daily challenges with predefined boards - Compete against personal bests ## Recent user reviews (5 of 5) All indexed reviews: https://appshunter.io/ios/app/okudoku-number-brain-challenge/id1514940326/reviews.md ### 5/5 — . *2021-10-23* التطبيق جميل لاكن ٤٠ سؤال كثير لو كان ٢٠ سؤال افضل ### 1/5 — Improve *2021-01-05* Improve **Developer response:** Hi! Thanks for taking the time to share your feedback with us. We are working on the next version of the app and would appreciate your input on this. If you have any suggestions or ideas on how to make the app satisfying for you, please let us know at support-okudoku@kechko.com. We'll be glad to hear from you and make our app better! ### 5/5 — A nice game *2020-06-29* It is a nice game, it ii a fantastic, thanks. ### 5/5 — AWESOME!! *2020-06-29* LOVE this game!! I didnt understand the concept of how to play....watched a short youtube for beginners.... & MAN O MAN.... I GOT IT!!! Can even play “expert” level! VERY ADDICTIVE!! THANKS for an AWESOME, FREE GAME!! ### 5/5 — Love this Game! *2020-06-29* This game is challenging and fun! ## Frequently asked questions about OkuDoku Number Brain Challenge ### What is OkuDoku? OkuDoku is a mobile game that combines the gameplay mechanics of Sudoku and Tetris. Players strategically place numbered blocks on a board to form lines and squares, aiming for high scores. ### How do you play OkuDoku? You drag and drop blocks with numbers onto the board. Score points by building lines or squares that contain numbers from 1 to 4. The game ends when you have no available moves left. ### What are Daily Challenges in OkuDoku? Daily Challenges are new puzzles released every day. Each challenge starts with a predefined set of numbers on the board, and the goal is to reach a target score without running out of moves. ### Is OkuDoku free to play? Yes, OkuDoku is free to download and play. It is supported by advertisements. ### Does OkuDoku have ads? Yes, OkuDoku contains advertisements. This allows the game to be offered for free to players. ### What devices does OkuDoku support? OkuDoku is supported on iPhone and iPod devices. It is rated for ages 4 and up. ### How often is OkuDoku updated? The latest version of OkuDoku is 1.43, last updated on January 21, 2023. Updates typically include improvements and new features based on player feedback. ### What do players like about OkuDoku? Players appreciate the unique combination of Sudoku and Tetris gameplay, finding it challenging and engaging. The daily challenges also provide a consistent source of new content. ## Version history (last 5 releases) ### 1.43 — 2023-01-21 UX improvements ### 1.42 — 2022-12-28 UX improvements ### 1.41 — 2022-05-02 UX improvements ### 1.40 — 2022-01-02 Compete in Daily Challenges! Every day a new Challenge is unlocked. ### 1.32 — 2021-01-02 Compete in Daily Challenges! Every day a new Challenge is unlocked. ## Apps similar to OkuDoku Number Brain Challenge | App | Rating | Price | Category | | --- | --- | --- | --- | | [Merge Hexa™ Number Puzzle Game](https://appshunter.io/ios/app/merge-hexa-number-puzzle-game/id1497489224) | 4.9 (63,807) | Free | Games | | [Numpuz: Number Puzzle Games](https://appshunter.io/ios/app/numpuz-number-puzzle-games/id1340841589) | 4.8 (105,194) | Free | Games | | [Wood Block Puzzle Games](https://appshunter.io/ios/app/wood-block-puzzle-games/id1466197423) | 4.7 (429,572) | Free | Games | | [Sticker Book: Color By Number](https://appshunter.io/ios/app/sticker-book-color-by-number/id6450409974) | 4.6 (37,696) | Free | Games | | [Block Blast！](https://appshunter.io/ios/app/block-blast/id1617391485) | 4.9 (2,664,230) | Free | Games | | [Blockudoku - Block Puzzle Game](https://appshunter.io/ios/app/blockudoku-block-puzzle-game/id1452227871) | 4.7 (657,920) | Free | Games | ## More apps by Pawel Kieczko - [IQ Test & Brain Training LEVO](https://appshunter.io/ios/app/iq-test-and-brain-training-levo/id1546228874) - [Unique Quotes for Inspiration](https://appshunter.io/ios/app/unique-quotes-for-inspiration/id1599333767) - [SleepyCat - Bedtime stories](https://appshunter.io/ios/app/sleepycat-bedtime-stories/id6479604101) All apps by Pawel Kieczko: https://appshunter.io/developer/1498102835 --- *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 2026-08-18.*