Apple won’t let you remove any of it stock iOS apps. So if you’re like me and you prefer a third-party app over, say, Apple’s Podcasts app or Weather app, you probably created a folder, named it something spiteful (“Junk” or something similar; I actually use an apple emoji), and then stashed the app in there.
HiddenApps was a free app that let you hide those apps, as well as disable iAds and access the iPhone’s Field Test mode. The app also had the ability to reinstall any Apple apps. HiddenApps wasn’t a permanent fix, however; when you rebooted your iPhone, the Apple apps reappeared.
There’s currently an unofficial way to remove Apple stock apps in iOS 9.2, but like with the HiddenApps app, the Apple apps reappear when you reboot your iPhone. Chances are, Apple will “fix” this method in an upcoming iOS update.