What is the package name of the Google Play app and the AndroidPIT app?
It's com.android.vending - https://stackoverflow.com/a/4439898/570168
and de.androidpit.app - https://play.google.com/store/apps/details?id=de.androidpit.app
if you have the .apk files wit you can download re-sign.jar file and you can find the package name and main activity class name