Shikaku - Brain Workout

Shikaku - Brain Workout

Brain Puzzle Games

1K ratings
16 reviews
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • May 26, 2026
  • July 21, 2026

Features

Shikaku - Brain Workout screenshot #1 for iPhone
Shikaku - Brain Workout screenshot #2 for iPhone
Shikaku - Brain Workout screenshot #3 for iPhone
Shikaku - Brain Workout screenshot #4 for iPhone
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About

This logic puzzle game challenges you to divide a grid into rectangles and squares. Each shape must contain a single number, and its area must match that number. Enjoy hundreds of levels offline with a clean interface.

✓Grid division logic puzzles
✓Hundreds of levels
✓Offline play
✓Minimalist interface
✓No timers or pressure
✓Beginner to expert difficulty
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What's New in Shikaku

1.2.7

July 21, 2026

New mechanics

1

Subscriptions & In-App Purchases

$5.99

Zen Mode

Remove interruptive ads

User reviews

Falls apart after the first 150 games!

I played to over 650 and find every 3rd game is exactly the same! This needs to be avoided as better games exist.

Challenging

Challenging yet fun

Missing Logic

There needs to be a logical way to finish solving when there is a large chunk with just question marks. Even having one of the counts displayed without even placing it - like, there’s a 9 somewhere. There’s nothing logical at the moment and is very frustrating

Still easy after 500 levels

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

I loved this game until I didn’t.

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.
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FAQ

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.