The text provides a comprehensive guide on building a mobile chat application using PhoneGap/Cordova, which allows developers to create apps for multiple mobile platforms using a single codebase written in JavaScript, specifically AngularJS. By leveraging HTML and AngularJS, developers can construct a web-structured app that adapts to various screen sizes without the need for learning native languages like Swift or Objective-C. The tutorial details the installation process for Cordova on iOS, including necessary tools like Xcode and ios-sim, and outlines the steps to create a PhoneGap/Cordova project. It explains the structure of a Cordova project, highlighting key directories such as "platforms" and "www," and emphasizes the use of AngularJS attributes for dynamic user and message listing. The guide also covers the integration of PubNub for real-time communication, enabling message subscription and user presence tracking, and provides instructions for testing the app on emulators and devices by building the Cordova code into a full Xcode project.