Norton Family on IPad, IPhone

Hello,
I just purchased an upgrade version for the Norton Online Family to the premier, because I am trying to install it on my sons IPad that he just got, (I upgraded this, because the free version was giving me problems). and I get an error as Safari cant download, Is this service not available to protect our sons IPhone and IPad?
Any recommendations or advice?
 
Thank you in advance for your time and knowledge.
 
Sincerely,
Tungerz