MasTrack Live GPS Vehicle Tracker with engine diagnostics is a great little device to give you health updates in addition to GPS tracking. Get unlimited email & text messages for alerts on engine health as well as GPS notifications (requires subscription for $10.99 US per month). Setup zones and get GPS zone alerts notifying you when you vehicle enters or leaves a specific zone. This is great for teen drivers. This product is featured in our buyer's guide: Best GPS Tracking Devices For Cars.