Confirm if apps have successfully installed from Google Play (Without looking at the phone) My girlfriend recently had her phone stolen and I'm trying to track it down by remotely installing apps on her phone via Google Play, but I can't tell if the apps are successfully installed.  For example, if I turn off my phone completely, and install an app on it from Google Play, it will still report "installed" even though my phone's turned off.
The answer to your specific question is, unlikely.  You can install an app that has an interface that you can communicate with.  Communicating with that interface can allow you to know.  But other than that, it's unlikely.  And you'd have to have confirmation on the android to accept the manifest of the app's requirement list.

You may not be fully lost, however,  Google does have a feature by default that you might be able to track your phone even if you didn't install an app.

These are some requirement which most people normally have:

- The android is connected with your Google account.
- Your android has access to the internet.
- The the Android Device Manager (ADM) to locate your android (turned off by default)
- Allowed ADM to lock your android and erase its data (turned off by default).


Try Google's Android Device Manager.