Mileage tracker

I have been using gridwise for a little over 4 years, I've paid for plus for almost 2 years of not longer. I have always had a problem with it automatically tracking my miles correctly. I never used android auto until just recently and that seems to be the only time the auto tracker works and tracks nearly the correct miles. I'd say it's about 98.5% correct. It's actually pretty upsetting that I've been paying for a service that hasn't lived up to what I was promised. I've always personally tracked my mileage to compare it with gridwise. Alright at times the uber app disrupts my location settings for all apps using my phone. I've take to uber about that problem when I see it happening but their may be times I don't physically see anything that alerts me to the problem. I do have 2 phones that I use. 1 specifically for uber. But since switching which phone I use for uber. I've noticed that specific one doesn't always seem to have my location. And I know uber hasn't been sending me ride request when I'm in a very busy area. Could the apps for gridwise and uber being used at the same time cause the issues in having? I have switched phones on day when Uber's navigation was completely off by hundreds of miles. But as soon as I turned on the uber app it started misbehaving the same way as my other phone did. I have tried running the gridwise app on the other phone that isn't also running uber. But the mileage tracker still didn't work right. I will try it again. But I want to make sure you're aware of the problem I've been experiencing for quite a long time, before I forget.