You can do iPhone split screen multitask to use two apps on screen at once, without a jailbreak. Maybe you want to scroll your Instagram feed at the same time as playing a YouTube video. The iPad ...

You can't split the iPhone screen to show two apps at the same time, but you can use Picture-in-Picture mode and quickly switch between apps.

How to Adjust Split View To adjust the amount of screen real estate given over to either app in Split View, drag the app divider to the left or right.