Here's a UML diagram of app architecture. The patterns and procedures used to develop and create an application are described in an application architecture. The architecture provides a road map and best practices to follow while developing an application, resulting in a well-structured app. You may use software design patterns to help you construct an application. The goal of utilizing a UML diagram is to graphically depict a system together with its major actors, roles, actions, artifacts, or classes in order to better understand, update, manage, or document system information.