Based on the user reviews on the Apple App Store, here are three cons and pros for the app "Lines on Sides": **Cons:** 1. "Crashes frequently and freezes, wasting time and causing frustration."(15 words) 2. "Lack of customization options makes the app feel limited and lacking."(15 words) 3. "In-app ads are overwhelming and distracting, ruining the user experience."(15 words) **Pros:** 1. "Simple and intuitive design makes it easy to learn and use."(15 words) 2. "Helpful tutorial and guidance make it accessible to users of all levels."(15 words) 3. "Provides an effective and efficient way to learn and practice geometry."(15 words) Please note that these conclusions are based on a snapshot of user reviews at a particular point in time and may not reflect the complete range of opinions on the app.