It's quite incredible how quickly Sudoku has become one of the most popular puzzle games on the planet. It seems that whenever you get on a bus, train or plane, you're guaranteed to see at least one person gazing at a block of numbers looking quizzical with a pen in their mouth.

The problem I have with Sudoku is that I find it gets very repetitive very quickly and I often end up putting down my puzzle book after just a couple of games. Skinz Sudoku breathes new life into the format of the game, with innovative gameplay that will keep you glued to your Smartphone's screen.

Like a normal game of Sudoku, you must fill the board with numbers from one to nine without repeating them in the same row, column or square. However, Skinz Sudoku offers four different ways of playing to add a little diversity to the proceedings.

The first is 'Wheel', where you pick a number from a number wheel that appears around the tile you selected. Then there's 'Square' which is essentially the same thing only with a simpler layout. 'Bar' is particularly interesting, as you first select the number you want to plot before touching the grid to put it anywhere. The final one is 'Writing' where you simply type in the number you want to include.

The game allows for the creation of new boards, the ability to change the appearance of the environment, save and load games, all without using the pointer. Though the game offers some fun ways of inputting numbers, the puzzle itself is essentially still the same, so if you're not into Sudoku then don't bother.

However, if you're an affectionado then Skinz Sudoku will add a more more variety to the way you play the game.