Of what? – ColorArt Coloring Book Review

Is this app free? Is that why it is so erratic in its implementation. Or is the point that since it's free, it can can jerk the user around? It works fine at first, then the ads pervade and dominate to disallow usage. If it worked as it was expected to, i.e., normally, it would receive a 4+ from me.
Review by unhpi on ColorArt Coloring Book.