[Does this work with another AV?]

Thanks for the reply.  I suppose I can do it that way (with the 30-day money back guarantee).  It's just annoying because if it won't work with Sophos it's no good to me, and with a money-back guarantee I have to carefully read the T&Cs, instead of just installing the trial and checking it works.  I still haven't figured out how to install the 'free' version of KSK, apparently there is some free version with limited features (according to some reviews), but I created an account and can't see any option to download software without a subscription.

[Does this work with another AV?]

I am planning to use Sophos AV along with KSK for parental control (MacOs).  Will this combo work?  I notice there is no option for a free trial of KSK only.  I can only trial the premium plan which includes KSK.  Can someone give me a link to a free trial of KSK only?

thanks.