Better weigh mobile towing scale

I was looking at tongue weight scales and saw this. It uses the obd port to make calculations to determine the weight of variuos things using physics. (newtons laws).. I am sceptical about the accuracy, but curious enough to maybe spend $99 to give it a go..

CURT 51701 BetterWeigh Mobile Towing Scale with TowSense Technology (OBD2) Apple, Android Smartphones, Tongue Weight, GCW, Weight Distribution

CURT 51701 BetterWeigh Mobile Towing Scale with TowSense Technology (OBD2) Apple, Android Smartphones, Tongue Weight, GCW, Weight Distribution, BLACK PLASTIC

https://www.amazon.com/dp/B081FTQCYN/ref=cm_sw_r_cp_tau_Go23Eb8AQ3HDX

 

I use a standard tongue scale and it is not like the weight is going to change a lot while driving down the road once you are ready to go and weighed in?!

This seems like another electronic gimmick to me really but let us know how you like it!

This is what I have and I paid almost nothing for it on Craigslist too.

https://www.sherline.com/product/sherline-trailer-tongue-weight-scale/