Based on the users' reviews, here are three cons and three pros of the app: **Cons:** 1. Many users complained about the app's frequent crashes and freezing issues. 2. Some users found the app's graphics and sound effects to be outdated and lacking. 3. A few users reported issues with the app's in-app purchases, claiming they didn't work properly. **Pros:** 1. Users highly praised the app's realistic aquarium simulation experience. 2. Many users appreciated the app's ease of use and intuitive interface. 3. The app's relaxing and calming atmosphere was praised by many users for its therapeutic benefits. Please note that these conclusions are based on the available reviews at the time of my knowledge cutoff, and may not reflect all users' experiences with the app.