We promote our app (iOS & Android) a lot, to get new user installs via Facebook.
Using the Facebook SDK 3+ (iOS & Android), you can measure app installs (Facebook documentation). Titanium Facebook module implements the SDK 3.0.0 so it is possible to use this.
We observe, in our Facebook app dashboard, that iOS new installs are properly reported, but that is not ok on Android. Is there anybody here that observed the same issue? This JIRA seems to confirm it.
We fixed the Facebook module for Android. But impossible to test it; the app should be published on Google Play to test the implementation (see this link on StackOverflow). Here is the fix we made!
Does it seem ok for you ?