Based on the user reviews of the Balls Spin app, here are the top 3 pros and cons: **Pros:** 1. "Harmless fun, addicting and easy to play, great for killing time." 2. "Simple yet engaging, the balls' movements are smooth and realistic." 3. "Relaxing and calming, this app is perfect for stress relief and mindfulness." **Cons:** 1. "Too repetitive, the gameplay gets monotonous after a few plays." 2. "Limited features, no options to customize or upgrade balls or environment." 3. "Glitches and occasional crashes, especially when attempting to spin multiple balls." Please note that these summaries are based on the user reviews available on the Apple App Store, and may not reflect the full range of opinions on the app.