It's odd to me when I see internet services advertised as "always with you", when what they actually do is keep your data far away on a locked-up server and provide you a tiny little window via your mobile phone. That's not "with you", that's available, and it's only so long as you have mobile data, which can be spotty.
Personally, I write portable software and allow it to sync via Dropbox. That's the way I like my data and apps "always with me". They keep working even when my internet connection drops out.
Mokalus of Borg
PS - Online services are only "always with you" in the sense that the internet is.
PPS - And their servers are still running and not flooded with traffic...