Based on the users' reviews of the Complex Memory Trainer app, here are three cons and pros in 15 words or less: **Cons:** 1. Slow loading times and occasional crashes frustrate users. 2. Limited customization options for tailored training needs. 3. Some users find the exercises too easy or too hard. **Pros:** 1. Effective in improving cognitive function and memory retention. 2. Engaging and interactive exercises keep users entertained. 3. Personalized feedback and tracking motivate users to improve.