First there was Microsoft Paint, the lone digital option for the coloring-obsessed. Then came a flood of beautiful drawing and coloring apps that required too much skill for the average person (me).

Among top free iPhone apps of the week, cell-growing game Agar.io engulfs a number of top spots around the world; 'Colorfy' packages up the coloring book experience for iOS; 'Nono Islands' proposes a ...

Four out of five stars. If you are someone who still loves to color in coloring books, Colorfy is a must have app. Finally, there is a coloring book for adults. While the app still can't beat a real ...