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Scan gauge, ultra gauge and the torque app. user here.
Torque app. is fine but I prefer the ultra gauge.
Opening the app. and Bluetooth connectivity can be a pain in the butt.
With the ultra gauge you just turn the key and it is up and running.
Scan gauge is ok, but has a limited viewable gauges at any given time.
It my opinion a aftermarket gauge is a must and will pay for itself many times over.
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