Imagine we are developing an application where a person can record their sports activities. On the main screen, a user sees three types of training. When they open any workout, they can start the timer and a list of exercises appears on the screen. In addition, the application has another screen with analytics for all training sessions at once. There is also a separate settings tab with social media "share" button, an email field to subscribe for updates, and privacy and policy documents.
How many screens are there in this interface structure?