Understanding the functionality of an app is only one part of programming. The programmer also has to focus on specific features and how to implement them.
Before the serious work of building apps begins, a brief overview of how applications perform is useful. Let’s get beyond the pretty screen and graphics that you interact with and start to look at what is really happening and how to make an app perform the way you envision. After doing this, you will be able to understand how apps can request information, pull in data from the Internet, and interact with other applications.