Based on the users' reviews of the "Calculate84" app, here are three cons and pros in English, limited to 15 words each: **Cons:** 1. "App kept crashing and freezing, frustrating experience." - User frustration with app stability. 2. "Calculations not accurate, resulting in incorrect answers." - User disappointment with app's calculation accuracy. 3. "Limited features and functionalities, not worth the download." - User dissatisfaction with app's limited features. **Pros:** 1. "Easy to use, intuitive interface, even for non-math experts." - User praise for app's user-friendly interface. 2. "Fast and efficient calculations, convenient for quick checks." - User appreciation for app's speed and convenience. 3. "Helpful for students and professionals alike, a great resource." - User recognition of app's value as a study aid. Please note that these conclusions are based on the reviews available on the Apple App Store as of my knowledge cutoff. Reviews can change over time, and more reviews may not reflect the same sentiments.