Based on the user reviews on the Apple App Store, here are three cons and pros for the app "Drill All": **Cons:** 1. "Poor customer support" - Users report difficulty getting help from the company, with some claiming they're ignored or left without a resolution. 2. "In-app purchases lacking clarity" - Some users feel that the in-app purchase options are unclear, leading to frustration and disappointment. 3. "Limited features for free users" - Some free users feel that the app's limitations are too restrictive, making it difficult to get a sense of the app's full potential. **Pros:** 1. "Effective learning tool" - Many users praise the app's ability to help them learn new skills and improve their knowledge on a specific topic. 2. "Ergonomic design" - Users appreciate the app's clean and intuitive design, making it easy to navigate and use. 3. "High-quality content" - Users report that the app's content is well-researched and informative, providing valuable insights and lessons.