Based on the users' reviews of the "Animals & Birds Coloring Book" app, here are three cons and pros in 15 words or less: **Cons:** 1. Some users found the app too simplistic and not challenging enough. 2. A few users experienced issues with the app's user interface and navigation. 3. A few reviewers felt that the app's content was too limited and not varied enough. **Pros:** 1. Users praised the app's relaxing and calming effects on children and adults alike. 2. Many reviewers appreciated the app's diverse range of animal and bird species. 3. Several users enjoyed the ability to customize and personalize their coloring experience. Note: All the ratings and reviews on the app's page are generally positive, with many users enjoying the app's soothing and creative experience.