Don't expect much from Norton Security for iOS devices. The advertisement for Norton Security Premium on the web site says " Secures multiple PCs, Macs, smartphones and tablets with a single subscription". The iOS logo is displayed. However, after you buy and try to install the mobile app, you discover that it only backs up contacts and has a locate-phone app. Unacceptable.
I spent 35 minutes with phone support changing my subscription to the 5-device version (I originally bought the 10-device subscription). Not worth the $10 I recovered, but I did it based on principle.