However, in the future, they may be set to "True," which will allow some applications to be hidden from your iOS Springboard. However, it is possible that the ability to remove some of the applications will be limited to the new classroom feature in iOS 9.3 on iPads. This brings support for multiple users on a single iPad. It is also possible that these strings are only for apps on Apple TV.
iOS 9.3 includes the ability to hide virtually any application by creating a suitable configuration file. iOS profile, using Apple Configuratorfor Mac. However, this option is for educational and business purposes only.
As already said, iOS lacks the ability to hide any of the pre-installed apps. There's also a difference between hiding and removing. If you hide an app, it means it can still work, like FaceTime. So there's quite a bit of confusion. For example, on the previous generation Apple TV, you had the option to hide all installed apps from the home page. On the fourth generation Apple TV you can remove them, not hide them.
*Source: idownloadblog
He said it before. Cook – it will work.