Hi, there is something that surprised me. In the “Model View ViewModel” case you state that “DataManager returns response to Activity/Fragment instead to Presenter. That means that Activity/Fragment is aware of business logic (POJO).”

I suppose in your example Activity/Fragment is in the View layer. Looking at some diagram of the MVVM pattern there is a total separation between View and Model. No knowledge between them. The ViewModel not the View receives events from Model.