Which account?

I am an iOS user, and purchased Android phones (Motorola Moto E) for my kids to be able to use the Norton family monitoring software.  I have a question about accounts on the phone.  Which account should Norton Family be installed on?  There is the owner account, and when I try to install on the acct, the App tells me:  if you install on this acct, the child can disable the software, etc.  However, when I install on the child’s account, they can easily go into “usage access” within “settings” and switch Norton family to “Off”.  They haven’t done this yet, but it doesn't seem very secure.  Please advise!