well Apple has find my device. It would be a good idea to have a "find my car" app. If you were able to covertly keep a device on the vehicle that could hold a charge from the car, and have a back up battery. You could get online and see where your car is at all times. If your car ever got towed, keeping track of your teenager with the car, and so on.
It is nice , I can do it with all my Apple devices, pretty easily (iPad, iPhone, macbook). Plus it is free.
I have not used Lojac, but from what I heard thee is an annual cost to keep it going and being on there satellite network. It may be a lot more reliable because of this.
I am just suggesting it would be nice if there was a low cost alternative.