After analyzing the user reviews of the "Glass Challenge" app, here are three cons and pros in 15 words or less, as requested: **Cons:** 1. **Lack of engagement**: Users complain the app is boring and lacks activities to keep them interested. 2. **Technical issues**: Many reviewer's say the app crashes frequently, freezing, and has poor performance. 3. **Too many ads**: Users are frustrated with the excessive number of ads within the app. **Pros:** 1. **Fun and interactive**: Reviewers praise the app's engaging mini-games and creative challenges. 2. **Rewarding experience**: Users enjoy the sense of accomplishment and rewards for completing challenges. 3. **Simple and easy to use**: The app's user interface is praised for being straightforward and easy to navigate. Please let me know if you'd like me to expand on this or provide more information!