Based on the users' reviews of the WinFab Sheet Metal Ductulator app, here are the conclusion: **Cons:** 1. Limited functionality: Some users find the app too basic and lacks features they need. 2. Glitches and crashes: Reviewers report occasional technical issues that disrupt their workflow. 3. Steep learning curve: New users may struggle to learn the app's interface and functions. **Pros:** 1. Convenient on-the-go design: Users appreciate the app's portability and ease of use anywhere. 2. Accurate calculations: Reviewers praise the app's accuracy and reliability for sheet metal calculations. 3. Saves time and effort: Many users report increased efficiency and reduce time spent on calculations. Note: The 15-word limit for each item was applied to the cons and pros summary.