"How would my phone know what I'd read on my computer if I'd already left the house?" Your phone could just contact your home computer via IP address (or maybe

"How would my phone know what I'd read on my computer if I'd already left the house?" Your phone could just contact your home computer via IP address (or maybe domain name, dynamic or otherwise) your home computer has. Your home computer would, of course, need to be on at the time your phone tries to connect to it (and vice versa). Another option is to use an intermediary server under your control, like perhaps a VPS host that you'd run some syncing software on, and have both the phone and your home computer sync to that. That way, only the VPS and the machine/phone you're syncing from would need to be on at a time (ie. both your phone and home computer wouldn't need to be on at the same time, if that was a problem for you).