Every good developer wants and tries to create the most sophisticated applications to delight their users. Most of the times, developers achieve this on the first release of the application. However, with new feature addition, fixing the bug without putting a lot of consideration into the structure of the application code becomes difficult due to code complexity. For this, there is a need for good clean structure of code. In this tutorial, you will learn how to reduce code complexity and how to maintain a clean and reusable structure of your code by using MVVM pattern.