Based on the users' reviews of the "FNF Arts Coloring Book" app, here are three pros and three cons: **Pros:** 1. Users praise the app's variety of coloring pages and themes, calling it "endless fun" and "so relaxing". 2. The app's user interface is praised for being "intuitive" and "easy to use", making it accessible to all ages. 3. Many users appreciate the app's ability to save and share their artwork, calling it a "great way to express creativity". **Cons:** 1. Some users complain about the app's occasional crashes and freezing, calling it "frustrating" and "annoying". 2. A few users mention that the app's color palette is limited, with some colors being "hard to find" or "not very vibrant". 3. Some users express disappointment with the app's lack of features, such as no option to undo or redo strokes, calling it "basic" and "underwhelming".