This is Sudoku with many representations :
Normal (9x9), Child (4x4), Simplistic (6x6)
Difficult (10x10), Very Difficult (12x12)

You can generate new game, resolve existent game
or build game

Grids can be edited on paper (Menu on /sdcard/download/Print.pdf)

It can be resolve with figures, letters, animals
or colors

Thank you to give your opinion to help me improve the product