Pigment

Pros
This is highly rated and known to be the only true coloring app for iOS! Premium gives you unlimited access to pages, books, brushes, fills and more. You have basic art brushes like pencil, marker, and crayon. Also special effects like glow, animal fur, fabric, wood and more. Choose automatic mode if you don’t want to go outside the lines. Or, choose freehand and color, shade and highlight all over for grayscale. Real artists are also on Pigment, so you’ll be able to color pictures from...