Coloring Book for Adults App. app recently received 5 positive reviews on iPhone, iPad, and Android devices, and 2 negative reviews. Users in the United States have given Coloring Book for Adults App. app an average rating of 4.39 out of 5 stars, based on a total of 896 ratings since its release on Mar 24 by Advanced Studio LLC. Can you share your positive or negative thoughts about Coloring Book for Adults App.?