After analyzing the user reviews on the Apple app store, here are three cons and pros for the Mega Subtraction 1-100 app: **Pros:** 1. Engaging and addictive: Users love the game's challenging and addicting nature, forcing them to improve mental math skills. 2. Trivia-based learning: Parents praise the app's ability to make learning subtraction fun, with a focus on rewarding accuracy. 3. Easy to use: Users appreciate the app's simple and intuitive design, making it accessible to children and adults alike. **Cons:** 1. Limited difficulty levels: Some users find the app too easy or too repetitive, wishing for additional levels or challenges. 2. In-app purchases dominate: Critics argue that the app's design and ads are heavily focused on encouraging in-app purchases, rather than providing quality learning experiences. 3. Limited customization options: Users suggest adding more customization options, such as selecting specific numbers or levels, to make the app more personalized. Please note that these are general conclusions based on the reviews and may not reflect individual experiences.