Today is all about App Indexing day where we will only cover topics on Google App Indexing. Why? Because we launched our Search Engine Roundtable app for iOS (free download) and Android (free download) - please download it.
In the Google+ Hangout on App Indexing, with Google's Mariya Moeva, John Mueller and Krzysztof Muzyka, Mariya said that Google does have internal commands for filtering app content in search, like you would with a site command or info:, cache: operators and other search operators.
Mariya Moeva was not sure if Google would release them to the public, at least not yet. But if they do ever release them, they would announce it on Google+.
At the 23:03 mark into the video, the question was asked, "Any plan to extend the site:, info:, cache: operators (on desktop search) to indexed app pages? site:android-app://com.gizmos.android/http/gizmos.com/ or a new document type: for site:gizmos.com."
The answer Mariya gave was "Yes. We also have been working on this but for now there is nothing that can be used externally. So if we do decide to release something in that respect, we will definitely announce it."
Here is the video embed at the start time:
Forum discussion at Google+.