by Ricardo Fernández Serrata
Detects when an app is updated, downgraded, installed or uninstalled.
PACKAGE_REPLACED broadcast doesn't work with /system apps. And comparing version codes and version names doesn't work because "When App Installed" returns null on those variables.
I haven't tested thoroughly, so I don't know if this also happens with other apps, and/or Android versions, and/or other devices
Reviews and ratings can be submitted in the app.