Based on the user reviews, here are three pros and three cons of the Ninja IO app: **Pros:** 1. Engaging gameplay: Reviews praise the app's addictive and fast-paced gameplay, with users enjoying the challenge and thrill. 2. Simple yet addictive mechanics: Users appreciate the simplicity of the game, making it easy to learn but hard to put down. 3. Nice graphics and sound design: Reviewers compliment the app's colorful and vibrant graphics, as well as the fitting sound effects. **Cons:** 1. Frequent ads: Several users complain about the frequency and interruption of ads, ruining their gaming experience. 2. Easy to lose progress: Some reviewers express frustration with losing progress due to connectivity issues or accidental exits. 3. Limited game modes: Users suggest more game modes or levels to keep gameplay fresh and exciting, feeling the game gets repetitive.