How QZ works
QZ connects to the battery terminals without touching the vehicle's electronics — no OBD, no CAN bus.
To the battery's plus and minus. Installation takes about 10 minutes on most vehicles — DIY or at a workshop.
Over its own mobile network — no Wi-Fi, no Bluetooth. SIM and mobile data are included in the active service. Works wherever there is phone signal.
A push notification says in plain language what is happening and what to do. No need to open the app.
Activation guides you step by step: QR code on the device, alerts on your phone, done. After that, only notifications when action is needed.
Real recording of the QR-code activation (26 s). The app runs in Slovak, English and German.
The QZ device before installation — connects to the battery's + and − terminals, typically ~10 minutes.
Exact measurement limits and what QZ does not measure — open methodology →