I'd be interested in this for some circumstances with the kids knowledge - and generally I'm interested in companies that are trying to do this without an alter

I'd be interested in this for some circumstances with the kids knowledge - and generally I'm interested in companies that are trying to do this without an alterior motive (see: Notabli for photo sharing). That said, as a parent, I also know that the knee-jerk reaction to get this tracking technology is really more of a crutch for me since the whole gig is to make them more independent so they can live lives on their own. The sweet spot for tracking is that it allows you to give them chances for autonomy potentially earlier than you might otherwise be comfortable with a greater margin of safety. The challenge as a parent is to turn it off after the first N number of times you grant them the autonomy.