Puzzle 15

This is not just another version of the Fifteen Puzzle: you can choose a picture from your gallery and the tiles will be made up by splitting that picture.

You likely known the rules, but, just in case you don't, I will tell you them.
Your picture is splitted in 15 tiles following a 4x4 grid in order to keep the right-bottom corner cell free.
One tile among those adjacent the free cell can shift in the free cell so the free cell becomes that where the shifted tile was; then another tile among those
adjacent the new free cell can shift, and so on.
In this way the App shuffles the tiles and in this way the player has to put the tiles back in order to rebuild the picture.