I have been using an app called Cerberus for the past year or so, it only cost about £2.60 (although I got my licence free during a promotion) for a lifetime license. Cerberus comes with loads more features than Googles offering.
The app can be installed as a hidden package with a discrete name, or as a normal APK. There is also a flashable ZIP package which will allow the software to remain and track the device even after a factory reset (aslong as the data connection is active).
Biting the hand that feeds IT
