Android's Split-screen mode, also known as Multi-Window, lets you run two apps simultaneously. This makes multitasking easier on your device. Here is a comprehensive guide to using this feature.

Split-screen was Apple's original multitasking solution for iPads, but I don't think it's the best. Stage Manager offers more window control, easier app switching, and support for up to four apps ...

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.