1. Go to Settings. 2. Scroll down and tap Apps. 3. Tap App lock and then click Turn on. 5. Set up a PIN, password, or pattern for apps you want to lock. 1. Go to Settings. 2. Scroll down and select ...

Photos permission settings on iOS. Screenshot: iOS. If you prefer, you can go through the app entry on the main Settings screen (scroll down to see all the apps installed on your iPhone).