Hello @Lumpi86 

HomeShield is a new security protection function provided by Avira, it has more advanced and powerful user functionality with more detailed reporting compared with the old versions, and this is where the value for the subscription really comes in. HomeShield is divided into the "limited" part and "Pro" part. The "Limited" part is free, while the "Pro" part requires a subscription and payment to use. It should be noted that HomeShield has a two-month free trial period during Prime Day Flash Sale (July 9 – July 16) for the users who subscribe for the first time.

Regarding the Parental Control settings, you should still be allowed to use the basic features without a payment, please check the below guide for more detailed instructions:

ow to set up the HomeShield Parental Controls feature on a TP-Link Router