Norton Family - Enable cumulative screen time per child across devices

We need the ability to set a cumulative screen time limit per child across all registered devices.  I realize the significant technical challenge behind this request and that it would necessitate a higher frequency of checkins between device and server, but most families have children that use more than 1 device per day wink, and parents would prefer to manage their free time as a whole, as I'm sure you already know.  Even if the accuracy wasn't perfect and the enforcement was somewhat loose, it would be a huge improvement over having to try to tweak the per-device allowances to fit their usage patterns.