Any one use this & how accurate is it?? It's way more expensive than a visit to the CAT scales. I mean you pack up your trailer & truck & take it to the CAT scales once before you hit the road for what $12.00.
https://www.curtmfg.com/towing-accessories/betterweigh
CURT 51701 BetterWeigh Mobile Towing Scale with TowSense Technology (OBD2) Apple, Android Smartphones, Tongue Weight, GCW, Weight Distribution.
$99.00 on Amazon