I had this same problem this morning (I get a DNS error for adobepass.ios.app). I took my iPad to work and the app worked just fine there....
So, I think it is an internet routing or DNS issue.
Oddly, when I got home it was still working until I actually closed the app. Then it would crash everytime I launched it (I had to delete and reinstall it to get it to run again).
A question I have is that I am using OpenDNS at home. I am curious if maybe that is the problem, so I was curious if others that are having this problem are also using OpenDNS?