Nice pictures, poor navigation
This app needs work. While the designs (pictures) and colors are nice, the navigation is flawed. Once zoomed, there is no way to move around the zoomed picture, requiring you to zoom out. The zoom control also seems to decide where it wants to zoom, regardless of where you tap. The pencil size is erratic. If you choose a large eraser, it changes the size of your pencil, forcing you to select the pencil size, and sometimes that doesnt work either - instead of the small pencil tip, you suddenly find a big blotch of color. A straight undo function would be much more efficient. All in all, this is an app I will likely not use, despite the beautiful pictures.
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ColorLife: Coloring Book for Adults – Free Adult Color Book