this adult coloring book with beautiful pictures to color is very easy to use. multiple color palettes and a personal gallery of your own works, along with calming, relaxing background music, make this anti stress coloring book for adults as user friendly as it can get! coloring books for grown ups like this one are a path to mindfulness. engage yourself in hours of peaceful color therapy with gorgeous coloring pages for adults, including mandala coloring book design. just select your color and tap to paint! the best mandals coloring book for adults is now available on your iphone and ipad!and it is all free! for all the beautiful illustrations,including mandala,zen and animals,along with many cool palettes! a mind journey which makes you anxiety free and stress relieving!