Several users have reported that they are not able to delete apps from their devices. To remove an app, tap and hold any app icon until the app icons start to jiggle. Then tap the (X) in the corner of the app that you want to get rid of. If you are unable to remove apps from your iPhone or iPad, it is highly likely that one of the following applies to you:
1-You are trying to delete an iOS built-in app. You cannot remove built-in apps. Some of the built-in apps are Maps, Camera, Passbook, Safari, Notes, Contacts, iTunes, Newsstand, Settings, Game Center etc.
2-You restricted deleting apps on your device. To check this, tap Settings > General > Restrictions > and toggle off “Deleting Apps”.
3-You device is unresponsive. Simply restart your device by pressing and holding the on/off button and then slide the red slider to power off. To turn back on, press and hold the on/off button until you see the Apple logo.