Based on the user reviews on the App Store, here are three cons and pros of the CD Check Mobile Calculator app: **Cons:** 1. Limited functionality: Some users find the app too basic, lacking advanced features of other calculators. "Just a simple calculator, not much else." 2. Glitches and crashes: A few users report experiencing issues with crashes and errors, which can be frustrating. "Too many crashes, can't use it reliably." 3. No offline access: Some users would like the option to use the app offline, without internet connection. "Needs offline mode, can't use it without Wi-Fi." **Pros:** 1. Easy to use: Many users praise the app's intuitive interface and ease of use. "Simple and easy to navigate, great for quick calculations." 2. Fast and accurate: Users appreciate the app's speed and accuracy, making it a reliable tool. "Fast and accurate, great for math problems." 3. Free and ad-free: Some users value the app's free and ad-free experience, making it a convenient option. "Free and no ads, love that!"