They hopefully have "as few data as possible in mind". @Andrew, well of course "bad experience" in terms of battery consumption, which a factor 2 is

I see you also have a friends/relatives usecase and I think it is a common one. I was thinking, Locus could become more state of the art as for emergency (or: phone lost) warning/support. I had some lose ideas like:
- Send position to Live tracking Web server if user may be in need. E.g., after a user defined time of "no movement".
- User may get an audio warning, before position is sent and could turn the next send off with one tap
- Send position with SMS, also user defined timer
- A privacy mode which only sends in case of (assumed) emergency.
But well, should go to helpdesk.