Shikaku — Logic Puzzle

Divide the grid. One answer.

Only for iPhone

Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.

iPhone

Split the grid so every rectangle holds one number, and that number is its size. That is the whole rulebook. Getting good at it is another matter. Shikaku is a logic puzzle with one rule. Divide the grid into rectangles. Every rectangle holds exactly one number, and that number is how many squares it covers. Cover the whole grid and the puzzle is solved. That is the entire rulebook. There is no tutorial to sit through — the first boards are small enough that the answer is nearly visible, and by level ten you are genuinely working. ONE ANSWER, ALWAYS Every board is checked for a unique solution before you ever see it. There is never a moment where you have to guess and hope. Anything you can work out, you can prove. IT CATCHES THE MOVE THAT BROKE IT A rectangle can obey every rule and still make the rest of the puzzle impossible — leaving a number with nowhere to go, or a square nothing can reach. Shikaku tells you at the move that caused it, instead of letting you discover it twenty moves later with no idea where it went wrong. MISTAKES COST SOMETHING. FUMBLES DO NOT. Dragging across a rectangle you already placed is a mis-swipe, not an error, and costs nothing. Change your mind mid-drag, come back to where you started and let go — that cancels, free. Only real reasoning errors count against you. Three per puzzle. SEVEN DIFFICULTIES Gentle, Easy, Medium, Hard, Expert, Master and Grandmaster. The hard tiers are not simply bigger boards — a Grandmaster puzzle has fewer, larger rectangles and far less that can be read off at a glance. It is close to pure deduction. WRITE DOWN WHAT YOU KNOW Switch to marking and drag across the line between two squares to note that they belong in the same rectangle. A mark is a note to yourself and nothing more: the game never checks one against the answer, and marking costs nothing. On a hard board it is how you keep hold of what you have already proved. A NEW PUZZLE EVERY DAY The Daily Challenge is free forever. Keep it up for seven days running and you earn hints. A calendar shows every day you have played, and a day you missed can still be played. It will not mend a streak, but it is there. THREE THEMES Midnight, Slate & Teal, and Forest & Brass. Switch whenever you like. THIS WEEK One weekly board, and it resets every Sunday. It lives on your device, so there is no sign-in, no account and nothing to join — it simply works. The twelve names beside yours are the game's own rivals, marked as rivals on every row, and they do not wait for you. FRAMES YOU EARN Eight frames for your avatar, each one evidence of something you actually did: a seven-day Daily streak, a hundred puzzles solved, a Grandmaster board, a week finished in the top three. They show on the weekly board, and the rivals wear theirs too. YOUR PROGRESS IS YOURS Put it down mid-puzzle and it is exactly where you left it. Your progress lives on your device, and there is no account to make. WHAT IS FREE AND WHAT IS NOT Shikaku is free to play, with every level and every tier, and the Daily Challenge is free forever. Ads are how it pays for itself: a banner on the home, calendar, leaderboard and game screens, an occasional full-screen ad between levels, and optional videos for a hint or a second chance. One payment removes them for good and unlocks every theme. No subscription. No account. No lives, no timers, and nothing to wait for.

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Shikaku is now free. Every level and every difficulty, with no paywall — supported by ads, with one payment to remove them and unlock every theme. Already bought the full game? You have Remove Ads: nothing changes for you. New: run out of pencils and you can keep the board with one more.

Version 2.0

The developer, MATTHEW DAVID BREMNER, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Used to Track You

    The following data may be used to track you across apps and websites owned by other companies:

    • Identifiers

  • Data Linked to You

    The following data may be collected and linked to your identity:

    • Location
    • Identifiers
    • Usage Data

  • Data Not Linked to You

    The following data may be collected but it is not linked to your identity:

    • Diagnostics

Privacy practices may vary, for example, based on the features you use or your age. Learn More

Accessibility

The developer has not yet indicated which accessibility features this app supports. Learn More

Information

Seller
MATTHEW DAVID BREMNER
Size
5.1 MB
Category
Puzzle
Compatibility
Requires iOS 17.0 or later.
  • iPhone
    Requires iOS 17.0 or later.
  • Mac
    Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
  • Apple Vision
    Requires visionOS 1.0 or later.
Languages
English
Age Rating
4+
In-App Purchases
Yes
Copyright
© 2026 Patmos Software
  • Developer Website
  • Privacy Policy

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      Discover new games and play with friends. This game also features leaderboards.

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