NSLocationAlwaysUsageDescription
A message that tells people why the app is requesting access to their location at all times.
Discussion
Use this key if your iOS app accesses location information in the background, and you deploy to a target earlier than iOS 11. In that case, add both this key and NSLocationAlwaysAndWhenInUseUsageDescription to your app’s Info.plist file with the same message. Apps running on older versions of the OS use the message associated with NSLocationAlwaysUsageDescription, while apps running on later versions use the one associated with NSLocationAlwaysAndWhenInUseUsageDescription.
If your app only needs location information when in the foreground, use NSLocationWhenInUseUsageDescription instead. For more information, see Choosing the Location Services Authorization to Request.
If you need location information in a macOS app, use NSLocationUsageDescription instead.