Wow,
After using ksk on my kids pc for few days, I made (convoluted) install on kid's Ipad.
I really didn't expect there is no total time limit over multiple devices available. I mean, do developers expect kids use one device only those days?
Plus to my surprise, KSK doesn't allow to block the ipad when the time is up.
I have to say this is a dealbreaker for me. It would save me a lot of trouble if this limitation would be clearly described somewhere. Maybe I just missed that.