Experienced mobile developers know to put as much logic as possible into an app's back-end for maintainability and testability. But what about logic tied to the user interface like interactivity and navigation?

Instead of using event handlers, delegate callbacks, and a tight coupling between app layers, ReactiveUI allows you to handle user interactions for your front end View through a LINQ-like syntax of subscribing to status changes in your back-end ViewModel. This makes it easier to test your app by testing your ViewModels independently of their Views with less reliance on UI testing frameworks.