Based on the users' reviews, here are three cons and pros of the Water Bottle 2 Flip Challenge app: **Cons:** 1. Limited customization options for users, causing frustration with default settings. 2. Some users experienced issues with the app's accuracy, leading to incorrect flip counts. 3. The app's notifications can be overwhelming, disrupting daily routines. **Pros:** 1. The app's gamification features effectively motivate users to drink more water throughout the day. 2. The flip counter provides a fun and engaging way to track daily water intake. 3. The app's simplicity and ease of use make it accessible to a wide range of users.