FlowDoku is basically Sudoku without the numbers. It’s available for Android and iOS devices (played on iPad here). In Sudoku, you must fill rows, columns, and squares with numbers from 1 to 9, but each number can only appear once in each row, column, and square. In FlowDoku, you can only have certain shape patterns in each row, column, and square. Like three blue squares, two orange triangles, and one yellow circle for instance. And the same shapes have to be next to each other, too. You can see how the pattern works at the bottom of the screen.
Control is easy; just tap blank spaces to cycle between the three available shapes. There are hundreds of puzzles from easy to very hard, and you can buy more with gems: FlowDoku’s in-game currency (the game is initially free-to-play, though). There are plenty of options to customize your game play experience, too. Change the screen from light to dark, toggle the ambient music off and on, turn off hints that tell you if you’ve made a mistake, and more. If you like the concept of Sudoku but don’t like numbers, than FlowDoku may be right for you.
Reading skill is helpful for the tutorials, and the game is probably best for older grade school kids who can grasp the logic skills required to enjoy Sudoku. The easy levels are pretty simple to figure out, though. Plus the game can be considered educational as it helps promote logic and other brain thinking skills.