Using Google to track location
Well your carrier has records of your location simply by triangulating your phone via the cell towers it automatically connects to as you travel around, so as far as that aspect it's not an app installed on your phone, nor is Google involved at all. It's just a basic function your phone provides you that the carriers take advantage of. Turn on Airplane mode and that should disable WiFi, cellular, and Bluetooth connectivity if you really want your phone to be invisible. Remove your SIM card too if you want to go to extremes. Of course that takes away a lot of benefits of even having a smartphone so there is that to consider.Hi I've read about Apps that can track a person's location without them knowing
What id like to know is can this be done or is it a scam
But if you're thinking just anyone can track you just because they feel like it, than no. That's just melodrama from TV and movies. If someone is actually targeting you specifically however, that is a different situation. But they can't just magically install some kind of spyware app on your phone remotely, that's something that needs to be done when they have actual physical possession of your phone without any supervision -- they need to a) crack the lock screen (in a way you don't later notice), b) manually install some kind of spyware app, and c) set it up properly (so it's not obviously detectable) and configured properly (set to communicate with whatever remote tracking source). So it's not a trivial thing to do. Basically, make sure you have a lock screen enabled and don't let other people just borrow your phone unless you can keep an eye on it.
Check back in after two weeks to see how it comes out, but it is normally pretty good. 
I think the links on device boards, like to Amazon to buy the device, are good, and should help in a number of ways. It's fun watching things appear.