ChatLicense is available in the app stores worldwide with specific pricing per country.
The Family subscription is for 2 children and 2 parents. The Family Plus is up to 4 children and 4 parents. You can always upgrade your subscription later.
Please note: the purchase of the subscription should be made by one of the parents, who will then become the subscription holder and can add their child(ren) and the other parent(s) to the subscription.