Thank you for your response.
This is disappointing. I need this feature badly enough that I will probably start looking for competing products that do have it, in addition to the ability to limit access by week or by month.
Also missing is the ability to grant extra time temporarily. For example, if my kids is working on a school project and his time runs out, I want to be able to grant him another half an hour. Right now the only way to do this is to pause KSK for those 30 minutes, which removes all protection, and that is definitely not acceptable. I saw that my child had a link to request more time, but even after he pushed it, the request never reached me - not by email, and not on my phone app, so it appears that the feature is not properly implemented.
Is there any plan to add these features?