# Shikaku - Brain Workout — Brain Puzzle Games > Grid-based logic puzzle game where you divide areas to match numbers. (iPhone/iPad app by Voodoo.) - Source: https://appshunter.io/ios/app/shikaku-brain-workout/id6772106126 (this page in markdown: same URL + `.md`) - Developer: [Voodoo](https://appshunter.io/developer/714804730) - Category: Games, Puzzle - Price: Free with in-app purchases - Rating: 4.70/5 from 1,020 App Store ratings · 13 written reviews indexed - Age rating: 12+ - Requires: iOS 14.0 · 315 MB - Languages: American English, Arabic, French (France), German (Germany), Italian, Japanese, European Portuguese, Russian, Chinese (Simplified, China), European Spanish and 1 more - Released: 2026-05-26 - Data updated: 2026-09-15 - Monetization: ad-supported - User reviews in markdown: https://appshunter.io/ios/app/shikaku-brain-workout/id6772106126/reviews.md ## What is Shikaku? Discover the relaxing yet challenging world of Shikaku, the classic Japanese logic puzzle! If you enjoy Sudoku, Nonograms, or Minesweeper, this is your next favorite brain workout. HOW TO PLAY: The rules are wonderfully simple. You are presented with a grid containing various numbers. Your goal is to divide the grid into rectangles and squares so that each shape contains exactly one number, and the area of that shape exactly matches the number inside it. FEATURES: • Easy to learn, difficult to master • Clean, minimalist interface designed for focus and relaxation • Hundreds of levels ranging from beginner to expert • Play entirely offline – no Wi-Fi required • No timers, no pressure – just pure logic and problem solving Keep your mind sharp and unwind with Shikaku - Brain Workout! ## Key features - Grid division logic puzzles - Hundreds of levels - Offline play - Minimalist interface - No timers or pressure - Beginner to expert difficulty ## Pricing and in-app purchases Base price: Free. **One-time purchases** | Purchase | Price | Type | | --- | --- | --- | | Zen Mode | $5.99 | one-time | ## Recent user reviews (10 of 13) All indexed reviews: https://appshunter.io/ios/app/shikaku-brain-workout/id6772106126/reviews.md ### 3/5 — Still easy after 500 levels *2026-08-12* I got to level 501. It’s a time sink when waiting to do something, but the levels don’t change much and the hard levels aren’t that hard, if not easy ### 1/5 — I loved this game until I didn’t. *2026-08-12* This is a grit game and I loved playing it until I reached about level 250. Then it started presenting the same game repeatedly, and finally gave me a layout with 6 contiguous mystery groups, no size or shape given. There are hundreds of possible combinations and working through them could take hours. I tried a few times to see if I’d get lucky, then deleted the game. No thanks, guess I topped out. Also, it’s really annoying to have to close and open the app to start each game due to the fact that the ads , once started, literally do not stop, ever. ### 3/5 — What have you done? *2026-07-23, version 1.2.7* I was really enjoying this game until the latest update. Now it’s just frustrating. The music is ok though the haptics are a little annoying but can be turned off. The animations at the end of the levels are cute if a little childish as is the font used for the numbers now. Annoyed because I paid for this game since I was enjoying it so much. It’s irritating now. You know what they say… if it ain’t broke, don’t fix it! ### 5/5 — Awesome *2026-07-18* Great game barely any ads super fun definitely recommend ### 2/5 — Severance *2026-07-16* Pretty sure it was brainwashing me somehow or I’m going to get a call from Lumin headquarters… too easy, too addictive… see you on the inside ### 3/5 — Too easy *2026-07-15* It started off slightly challenging, but after 250 levels the difficulty hasn’t changed, levels seem to repeat, and new updates have made it even easier. They just tell you if you did it wrong instead of forcing you to learn. It keeps telling me I’m like faster than 90% of people but that doesn’t mean much when there’s no difficulty progression. ### 5/5 — Review *2026-07-15* This game is a lot of fun. ### 3/5 — Ads freeze *2026-07-14* Like the game, but the “X” to finish ads for the developer, Voodoo, don’t release to the next screen. I go on to something else and come back, but… ### 5/5 — Focus *2026-07-12* Keep your eyes on the number and focus on the squares very nice game. It keeps you thinking. ### 5/5 — Stunning *2026-07-11, version 1.2.6* Addictive and clever ## Frequently asked questions about Shikaku ### What is Cortex Shikaku? Cortex Shikaku is a logic puzzle game where players divide a grid into rectangles and squares. Each shape must contain a single number, and its area must match that number. It's designed to be a relaxing yet challenging brain workout. ### How do you play Cortex Shikaku? The game presents a grid with numbers. You must divide the grid into distinct rectangular or square regions. Each region should contain exactly one number, and the area of that region must be equal to the number it contains. ### Can I play Cortex Shikaku offline? Yes, Cortex Shikaku can be played entirely offline, meaning no Wi-Fi connection is required. This makes it a great option for playing anywhere, anytime. ### What kind of levels does Cortex Shikaku offer? Cortex Shikaku features hundreds of levels that range in difficulty from beginner to expert. This variety ensures there's always a new challenge for players of all skill levels. ### Does Cortex Shikaku have ads? Yes, Cortex Shikaku contains advertisements. As a free game, ads are displayed to support its development and continued availability. ### What is the age rating for Cortex Shikaku? Cortex Shikaku has an age rating of 12+. This indicates it is suitable for players aged 12 and above. ### How often is Cortex Shikaku updated? The latest version, 1.2.3, was released on June 24, 2026. Updates typically include new levels, bug fixes, and performance improvements. ### What devices can I play Cortex Shikaku on? Cortex Shikaku is available on iPhone, iPad, and iPod devices. It is designed to run on Apple's iOS platform. ## Version history (last 5 releases) ### 1.2.7 — 2026-07-21 New mechanics ### 1.2.6 — 2026-07-09 levels improvements ### 1.2.5 — 2026-07-07 UI reskin ### 1.2.4 — 2026-07-01 Level funnel adjustments Areas auto validation ### 1.2.3 — 2026-06-24 Daily Challenges added ## More apps by Voodoo - [Rock Crawler](https://appshunter.io/ios/app/rock-crawler/id920335551) - [Fight List - Categories Game](https://appshunter.io/ios/app/fight-list-categories-game/id1115249449) - [Paper.io](https://appshunter.io/ios/app/paperio/id1171814682) - [Rolly Vortex](https://appshunter.io/ios/app/rolly-vortex/id1231932402) - [Snake VS Block](https://appshunter.io/ios/app/snake-vs-block/id1233739175) - [Flappy Dunk](https://appshunter.io/ios/app/flappy-dunk/id1235581326) All apps by Voodoo: https://appshunter.io/developer/714804730 ## Related topics [shikaku](https://appshunter.io/ios/topics/shikaku) · [shikaku logic puzzle2026](https://appshunter.io/ios/topics/shikaku-logic-puzzle2026) · [math workout brain puzzle](https://appshunter.io/ios/topics/math-workout-brain-puzzle) · [shikaku puzzle](https://appshunter.io/ios/topics/shikaku-puzzle) --- *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 2026-09-15.*