Is Viper architecture suitable for all types of iOS applications?

No, Viper is not the best choice for all iOS apps. While it offers excellent code organisation and is helpful for large, complex projects, Viper introduces extra layers (View, Interactor, Presenter, Entity, Router) that can complicate small or simple projects. For smaller apps, simpler patterns like MVC or MVVM are more suitable. Viper is most effective for large applications that require long-term maintenance, well-defined roles, and are expected to grow or change.