You could add a filter to the view (profile) in question. That will remove the data that you don't want. Another option if you don't want to loose the data in the view would be to create a custom segment that you could use when ever you want to split the data out.
Update from Google+
You can search with regex
^/app/
in the small search bar (custom segment) in your page reports (e.g. Behavior -> Site Content -> All Pages), after which you can look at the aggregate metrics for all pages which start with /app/ (i.e. all the pages with different parameters).
If all the /app/.* have the same page title, you can look at the Behavior > Overview report, but choose Page Title as the dimension.