FindArt Per iPhone

The goal is simply to find the differences between the Art Paintings.
3 HINTS to help and 3 differences to find.
Game Center Score Online.

Bosch, Botticelli, Brueghel, Canaletto, Caravaggio, Cézanne, Degas, Dürer, Gauguin, Giotto, Goya, Leonardo, Manet, Mantegna, Michelangelo, Monet, Perugino, Piero della Francesca, Raffaello, Rembrandt, Renoir, Tiepolo, Tintoretto, Tiziano, Toulouse-Lautrec, Turner, Van Eyck, Van Gogh, Velázquez, and more.