Based on the user reviews on the Apple App Store, here are three pros and cons of the "Color by Number New 2021" app: **Pros:** 1. Colorful and engaging: Users praise the app's vibrant colors and fun, addictive gameplay. 2. Soothing experience: Many users appreciate the app's calming effects and ability to reduce stress. 3. Diverse content: Users enjoy the variety of themes and scenes, making the app enjoyable to explore. **Cons:** 1. Ads intrusive: Some users find the ads too frequent and distracting, disrupting their experience. 2. Limited customization: Users would like more options to customize their coloring experience, such as different brush sizes. 3. No export option: Users are disappointed that they cannot export their finished artwork or share it easily. Note: These points are based on a summary of the reviews and may not reflect the opinions of all users.