iRonX

It works using the messenger.com website as well but isn't as seamless as the mobile version; with the map blinking in and out as it refreshes.  The other differences are the web version only shows a location pin whereas the mobile version shows the profile photo of the traveling person.  The web version has a label that says "Sharing for ___ minutes" while the mobile has the 60 minute countdown ring icon. 

We don't have an Apple Smart Cover on hand to see if the sleep/wake functionality is retained from iPad Air cases -- but we will in time for the full review.

I purchased a midnight blue Apple Smart cover last night and it has retained the sleep/wake functionality from the iPad Air cases.