While Android users are still struggling with unnecessary app permissions (execpt for Marshmallow users), you can manage app permissions on iPhone as easy as just some tapping on the screen to decide which app should have which permissions. In other words you get to specify if a certain app should access to your location, camera, picture gallery or Not.
So, to manage app permissions on iPhone, iPad and iPod Touch devices running the latest iOS version, do as follows:
1. Open the Settings application.
2. Scroll down to the middle and tap to open the Privacy settings
3. There you see the list of important permissions and accesses, each app may request to have.
4. Say we want to deny Instagram from accessing the Camera permission. Simply tap the Camera option and make sure the Instagram toggle button is OFF
Tip: If you want to see the permissions of a specific app in a single place, you need to do as follows:
1. Open the Settings application
2. Scroll all the way down to see the list of installed 3rd party apps.
3. Tap the application you want to view its accesses and permissions, and simply toggle off the ones you don't want to allow the app to have access to.