Optimus Tracker... I have two of them now.. Works incredibly well... You barely touch the car and I get a text and an email virtually real time... I had a car transported from Texas to California through Texas, New Mexico, Arizona & and California...
Passing through remote areas of Texas New Mexico & Arizona I knew every where my car went, fuel stops, meal stops, sleep stops... I knew the speed the car was travelling... Oh, the car was inside an enclosed trailer.. So when people tell you it doesn't work in buildings & in rular areas I say otherwise & I have real evidence..
I bought it through Amazon, cost about $50... The app can be loaded on Apple & Windows based phones, tablets & computers... There is a $12 monthlu charge...