Thank you for your help.
This does not seem to work unless I am doing something wrong.
I figured out that the id which appears on arcgis.com is the <itemid>. I sent the link to myself, formatted as you suggested. I tried sending the link from arcgis for iOS and from MS Outlook. When I tap the link, the iPhone switches to the arcgis application but does not load the map, instead the old map stays loaded. I tried this with several maps, same result. I tried signing in to arcgis.com, then tap the link, same behavior.
Using version 1.1, build 241.
Thanks for any help,
Paul Lohr