Based on the user reviews on Apple App Store, here are three pros and three cons: **Pros:** 1. **Improved cognitive skills**: User reviews praise the app's effectiveness in improving memory, attention, and reaction time. 2. **Fun and engaging gameplay**: Reviews mention that the app's puzzles and mini-games are entertaining and make cognitive training enjoyable. 3. **Portable and accessible**: The app is praised for being easily downloadable and playable on multiple devices, making it convenient for users. **Cons:** 1. **Limited content and variety**: Some users feel that the app's selection of puzzles and exercises is limited and becomes repetitive with frequent use. 2. **Difficulty adjusting settings**: A few users report difficulty in adjusting the app's difficulty level and settings, which can lead to frustration. 3. **Error messages and glitches**: Some users mention encountering error messages and glitches while playing the app, which can interrupt their cognitive training sessions.