Cool Sudoku is the best app for number puzzles

We have been working very hard to design the new version of our app. Finally it's ready. It comes with a lot of new features. Check it out now!

Why Cool Sudoku

All puzzles are not equal. It is easy to create a Sudoku Puzzle.
It is not easy to create a great puzzle. When we create a puzzle we first check it is unique, no puzzle can have more than one solution. Then we solve that puzzle. Using 35 different techniques we grade the puzzle very carefully, and that is the key. We know how to solve each puzzle and the techniques involved and so we can accurately give that puzzle a raitng.

Great to look at

Users like different things. Our aim is to make all our users happy and that is why we offer many different themes. Something for everyone and anyone, if you would like something added then let us know, we are here to make your puzzle experince as great as possible.

Fun to Play

Why Cool Suodku and not "the others". Well, this is because of the sheer variety of puzzles, puzzle styles, themes and difficulties makig every puzzle it's own unique experience making it so you can play over an over again.

Different Puzzles

This app not only has the norml suduko that we all know but also 5 other ways of playing, each with their own unique style of play to suit you style of play. Not only does the app have multile styles of puzzles but also 4 different dificulties so you can choose if you wat to challenge yourself or just play casually and have some fun.

Big Community

in this app we have introduced a competitive style of play in where you can compete with other member of the comunity to becom the top of the dailly leaderboards.

Puzzle types


Classic Sudoku uses a 9x9 grid and the numbers 1 to 9. Each number can appear only once in each row and column and also in each block (marked with a bold outline).

Mini Sudoku

Mini Sudoku uses the numbers 1 to 6 in a 6x6 grid. The same strategies can be used when solving these puzzles with each number only allowed to be used once in eah row, colum and block.


Jigsaw Sudoku uses the same rules as conventional Sudoku in that you must use the numbers 1 to 9 with each number occurring once in each row and column but in the case of Jigsaw Sudoku the boxes are of different shapes (and colors).

Sudoku X

Suduko X is just like normal suduko with a 9x9 grid where each number can appear only once in each row and column and also in each block (marked with a bold outline) however in suduko X there is an X in the going from corner to corner.Just like if it ws a row or colum no to numbers could be in the diagnol of the X.


The basics

•The clue represents the sum of the numbers in the adjacent block of empty cells
•The numbers 1 to 9 are used to fill the grid
•Each block may contain only one occurrence of a digit


Killer Sudoku uses the same rules as conventional Sudoku in that you must use the numbers 1 to 9 with each number occurring once in each row, column and 3x3 box. In the case of Killer Sudoku the clues are in the form of a sum of the numbers in a cage (defined bya dotted line and of the same color).

For example, a cage with the total of 3 can only contain the numbers 1 and 2, a cage with a total of 4 can only contain 1 and 3 (since we cannot use the same number in an row, column or box). By using a combination of the rules we can work out the possible values for a cell.


Hitori is played with a grid of squares or cells, with each cell initially containing a number. The game is played by eliminating squares/numbers and this is done by blacking them out. The objective is to transform the grid to a state wherein all three following rules are true:

  • no row or column can have more than one occurrence of any given number
  • black cells cannot be adjacent, although they can be diagonal to one another.
  • the remaining numbered cells must be all connected to each other, horizontally or vertically.


The challenge is to paint each cell black or white, subject to the following rules:

  1. Each numbered cell is an island cell, the number in it is the number of cells in that island.
  2. Each island must contain exactly one numbered cell.
  3. There must be only one sea, which is not allowed to contain "pools", i.e. 2×2 areas of black cells.

Cool Sudoku

Cool Sudoku is a great way to compete with your friends, challenge youself and have lots of fun. It's easy to learn and has different difficulties to suit your ability and to challenge yourself to become better. Cool Sudoku can be played as a casual way to pass time or as a intense challenge where you push yourself to become the best. With multiple themes it is not only fun but also looks cool whether you want your screen to look like a newspaper, chalkboard or even like a scene from matrix it's all there. So go now, get the app and try it out and maybe one day you can be the best.


Download Now

Click here to download our amazing app now and maybe one day you can become the best.