Kaku: Shikaku Logic Puzzle

Contains adsIn-app purchases
Content rating
Everyone
10+
Downloads
Content rating
Everyone
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About this game

Divide the grid into rectangles. There is just one rule — each rectangle holds exactly one number, and its area equals that number.

Drag to draw a rectangle. Fill every cell and the puzzle is solved. Ten seconds to learn, much longer to master.

■ No rush, ever
· No timers · No mistake limits · No lives
· Ads never interrupt you mid-puzzle
· Soft colors and calm music, easy on the eyes

■ 2,000 handcrafted puzzles
· Easy 5×5 · Normal 7×7 · Hard 9×9 · Expert 12×12
· 500 puzzles per difficulty, every one with a single verified solution
· Guessing will not get you through. Pure logic always will

■ A new challenge every day
· Daily Challenge unlocks a fresh puzzle each date
· Complete a full month to earn that month's trophy
· Track your streak on the calendar

■ Watch your mind grow
· Brain rank rises as you solve — six tiers from Beginner to Legend
· Spatial, Logic and Focus tracked separately
· See your weekly growth at a glance

■ When you get stuck
· A hint opens one rectangle to get you moving again
· Tap any placed piece to remove it
· Clear feedback tells you exactly why a move is not allowed

■ Made for you if
· You want something quiet to think about before bed
· You enjoy Sudoku, Nonograms or Picross
· You are tired of games that rush you

Available in 14 languages. Plays fully offline.

Find your quiet hour of logic in Kaku.
Draw rectangles to match each number. A calm logic puzzle with no timers.
Updated on
Aug 6, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Device or other IDs
  • This app may collect these data types
    Personal info, App info and performance, and Device or other IDs
  • Data is encrypted in transit
  • You can request that data be deleted

What’s new

Welcome to Kaku!

Divide the grid into rectangles — every rectangle holds exactly one number,
and that number is how many cells it covers. Simple to learn, hard to put down.

• 2,000 handcrafted puzzles across Easy, Normal, Hard and Expert
• Every puzzle has one unique solution — no guessing, ever
• A new Daily Challenge every day, with monthly trophies to collect
• Track your progress with brain stats and IQ
• Play offline, at your own pace. No timers.