This document compares key aspects of Android and iOS development environments including IDEs, simulators, dependency managers, widgets, libraries, and object relational mapping. It outlines tools like Android Studio and Xcode for IDEs, Genymotion and Xcode simulator, Gradle and CocoaPods, and common widgets like TextView/UILabel and libraries like Picasso/SDWebImage. The document also provides examples of using libraries like OkHttp, Picasso, and Realm on both platforms.