On the iOS app, a post that has been edited no longer shows the original post date:
Before any edits:
After at least one edit:
This makes it a little harder at first to see how old a post might be. You can press to see the full edit history, however on the mobile site, the original post date is always shown, with the latest edit beneath it:
Would it be possible for the iOS app to show both the original post date and the most recent edit as well?