Based on the users' reviews on the Apple App Store, here are three cons and pros of the Nonogram 7 app: **Cons:** 1. Slow loading times and frequent crashes are frustrating and disrupt gameplay. 2. Lack of tutorial or guidance for new players can lead to confusion and difficulty starting. 3. Limited undo feature and no hint system can be frustrating for puzzle solvers. **Pros:** 1. Challenging and engaging puzzles with unique themes and beautiful graphics. 2. Huge variety of puzzles to solve, from simple to complex, keeps players entertained. 3. Easy to use interface and clean design make it a pleasure to play daily. Note: The reviews are generally positive, with many users appreciating the app's engaging puzzles and intuitive interface. However, some users have noted some minor drawbacks, such as slow loading times and limited features.