This devices first page is the clock page and the user would be able to choose between a digital and an analogue clock (this would be selectable from the setting screen).
The second screen would be the notification screen when the user can see what notifications they have and they can use the microphone to react the these (reply, etc.).
The third screen is the user’s calendar. They can link this this up to their google/apple calendar and they can look at days using the select button
This fourth screen is the settings screen, this allows the user to change the settings on their device (Time and Date, WIFI connection, Bluetooth, and accessibility (Brightness, colour blind settings)).