I believe BulletFlight has this as well, but if you aren't parked on top of the weather station it's reading, it won't do you any good in the mountains. Pressure and temps vary a lot even a couple of miles from the stations around here.
We have tested it on shooter. It pin points your location between 3 towers to get the environmental conditions. I was sitting in the mountains in Wy next to my son. We had the same rifles in our phone apps. He would figure the dope for a shot using the auto input data and I would input to my phone from the kestrel. They were almost always the same or less than .25 moa different. That said it does require cell service and uses more battery. For those reasons and the fact I want to know what I input is correct for where I am, I still use the manual input mode.