Screens are the main organizing elements of apps

The most effective apps are built around a central home screen

There are no limits to the number of screens

Arrange Screens with Navigators

Most modern apps navigate through screens using bottom or top tab menus which enable swiping between screens (Tab Navigator), side menus that are invisible until swiped to appear (Drawer Navigator) or stacking a new screen that can be dismissed (Stack Navigator).

For screens to work with a navigator, they need to be dropped fully within its tree hierarchy.

Arrange elements within a Screen with Rows and Columns

Screens can be subdivided by Row and Column containers, the first aligns elements horizontally and the second aligns them vertically.