How to Passcode Lock an App in iOS

Apple doesn't have an official method for individually locking sensitive apps like Photos with a passcode, but luckily there's a workaround that was introduced in iOS 12 with Screen Time. If you really want to make sure one of your apps is inaccessible, you can use Apple's App Limits feature to do so. Here's how: Open up the Settings app. Choose "Screen Time." Make sure Screen Time is enabled and a Screen Time passcode is set. Tap on "Devices" in the upper left corner and select your current dev...