Is Viper commonly used in large-scale or small-scale projects?

Viper is mainly used for large-scale apps because it is built for clear, organised, and scalable projects. With its many parts (View, Interactor, Presenter, Entity, Router), Viper makes managing code in big projects much easier, supporting growth and good maintenance. For small apps, Viper adds too much setup and overhead, so simpler patterns like MVC or MVVM work better. In big projects, Viper's benefits outweigh the extra work required.