The Launch Image is the first image shown when opening the app. It is shown while the app is loading.
To simplify the building process we only require one launch image. Make sure that the launch image is square, that way it will scale up and down depending on device. If you are using a rectangular image it may sometimes look weird. The uploaded launch image needs to be a minimum of 1950x1950 pixels.
Below is an illustration of how the Launch Image works on different screen sizes.
Original Launch image
Launch image on a tablet