Except this (currently) requires users to point their phone at a satellite so it can connect and transmit, with clear line of site of the sky. It seems it will be more likely something you'd do when you get to your "campsite" and want friends/family to know where you are located.
edit: I didn't realize this will apparently be required due to the antenna design in the iPhone, seems very cumbersome, you can't easily see where the satellites are...
You don't really need to point it, at least with my inreach if its near the top of my pack and I'm not in a canyon or something I can get a message out.
> you can't easily see where the satellites are...
Which is why when you're using it they guide you on how to orient the phone (per their released info so far, we'll have actual user reports in a few weeks).
