VIPER

The View is the user interface. It's responsible for displaying things as directed by presenter and sends the actions taken by the user to the presenter

The Interactor is responsible for interacting between the presenter(business logic layer) and the data(domain layer)

This is our Business logic layer. Directing data between UI layer and Interactor Layer and taking user actions and calling to the router to move the user between views.

It's the information and data used on the functionality. In our case, it will be CoreData since our information will be stored there.

It stores the navigation logic used for describing which screens need to be displayed.