MathDoku — Number Puzzle
Rate itA daily KenKen-style grid, the same for everyone: fill rows and columns so every cage hits its target.
on apps.apple.com
MathDoku is an iPhone Calcudoku (KenKen-style) app with a free Daily Challenge each calendar day, the same puzzle for everyone. Fill each row and column with 1 to N without repeats while every outlined cage adds, subtracts, multiplies or divides to its target. 180 more levels run from 4x4 to 9x9.
About MathDoku — Number Puzzle
MathDoku, from BrainRash, is an arithmetic logic puzzle known as Calcudoku or KenKen; inside the app the screens are titled KenKen. Each grid holds the numbers 1 to N once in every row and column, and outlined cages give a target and an operation: the cells in a 20x cage multiply to 20, those in an 11+ cage add up to 11. Every puzzle has a single solution reached by deduction.
The home screen leads with the Daily Challenge, described as one puzzle for everyone today, with a streak counter; the one in the store pictures is a 6x6 grid. Beneath it sit 180 hand-made puzzles in six tiers, from Easy 4x4 to Grandmaster 9x9, with stars and best times that unlock the next tier. Hints point to the next deductive step without giving the answer, and there are undo, erase and reset buttons and a timer.
The app works fully offline with no account and no ads. It has five colour themes, Game Center leaderboards and achievements, a shareable solve card, and accessibility features including a colour-blind palette and VoiceOver. It is localized in eleven languages, with a right-to-left layout for Arabic.
How to play MathDoku — Number Puzzle
- Open the app and tap Daily Challenge.
- Fill each row and column with the numbers 1 to N, no number twice.
- Make the cells in each outlined cage combine with its operation to reach its target.
- Use a hint if stuck: it points to the next logical move.
- Finish the grid to keep your streak, then share your solve card.
Screenshots
Tips
- Start with single-cell cages: their target is the number itself.
- Big products in small cages allow few combinations; list them first.
- A two-cell subtraction or division cage limits pairs sharply, especially near the edges of the range.
- Use each row's and column's missing numbers together with cage totals to place the last digits.
Questions
Is the Daily Challenge the same for everyone?
Yes. The listing says a free Daily Challenge every calendar day, the same puzzle for everyone.
Is MathDoku the same as KenKen?
It is the same kind of puzzle, also called Calcudoku; the app's own screens are titled KenKen.
Does it need the internet?
No. It works fully offline, with no account; the Daily Challenge needs no connection.
Is it free?
Yes, with no ads.
Is it on Android?
No Android version was found; it is listed on the App Store.
Ratings and reviews
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Fill the grid so every cage makes its target with its operation.