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Why QZ

Evidence instead of promises: real cases, an honest comparison, open methodology and the actual people behind the product.

StoriesReal cases from operation — including the Maserati where the alert arrived before the car was left stranded.Read the stories → Bluetooth vs QZWhat a €30 Bluetooth monitor handles well, and when you need 4G monitoring from anywhere. Honestly.Compare →Car won't start after sittingWhy a parked car drains its battery — with measurements from the cars we watch. What to do today, and how to know in advance next time.Read →Battery keeps dyingFive causes of repeated discharge and how to identify yours from the voltage. Replacing the battery usually does not fix it.Read → MethodologyWhat we measure, what we don't, and where the limits are. For people who read data critically.Open the methodology → AboutThe Slovak company OOZI s.r.o. and the person who built QZ for his own cars.Meet us →
QZ guards more than the battery.
12 V battery
Unexpected movement
Vehicle position
EU services
Discover QZ Guard →