In late August, Google announced limited support for app search for person content. In short, it allowed developers to integrate their apps to let Google index locally personal content within the app, to be surfaced on search on Android devices, no wifi needed

But when it launched, it launched with select Android apps. Now, any developer can add it to their Android apps.

Google said “we’re inviting all Android developers to enable this functionality for their apps.”

For more details on how to implement this, see the developer docs.

Forum discussion at Google+.