When working with consumers and clients that have cognitive disabilities as well as children, it may be important to hide apps to make the display less clutter and visually distracting. Just remember, the hidden apps remain accessible from Spotlight Search, and come back when restarting your iDevice. Alternative method: https://youtu.be/N9_CvQxNBuc If you hide apps by this way ⬆️ everything stays where you left off when turn off your iPhone. https://youtu.be/N9_CvQxNBuc You can keep your apps permanently hidden in invisible folders; when reboot, everything remains so. The downside is that you can not do it with any wallpaper, only works with grey background.
Source: Hide Any App