81 Square is a mind trick app . This app has 81 boxes and user has to complete these boxes with numbers so that no number will repeat in horizontal as well as vertical direction. This app is something like Sudoku puzzle. Where user has to fill 9*9 squares and each square will contain unique numbers from 1 to 9. Also user need to careful that each particular row and column must also contain the unique numbers from 1 to 9. In this way each row, column and square will have unique 1 to 9 numbers. Also user can reset to new game at any time OR can check the fill ups while playing the game. So let’s start brain storming.