The Mongoose VT-4G GPS vehicle tracker for New Zealand vehicles. It reports live location and trip history to the free app and website, with no monthly fees.
A hardwired tracker is the practical option for theft recovery, since it stays powered and is not visible in the cabin the way a plug-in unit is. It also gives you trip history, which is useful for logging business use or keeping track of a vehicle other people drive.
The tracker needs a SIM to communicate. SIM cards, looms and security upgrade packs are listed under GPS tracker accessories.