Chffr for Android and Dash for iOS are applications that are used to collect road data for the comma.ai autonomous vehicle control system that is supposed to be sold late 2016 or early 2017 for $999 + $24/mo. Early release is only for folks driving an Acura with lane keeping assistance included in the car, but future versions should work on more models and makes of car.
I think it is an interesting concept, and I needed a dashcam for my car, to this seems to solve both at the same time. I have an old iPhone that I don't use but the wifi still works for uploading the data after a drive. I've been using it for about a week. For the user there is not much to it other than a dashcam, but I'm sure that Comma.ai will have much better use of the data for their model building. I wish I had it when it was first announced, but I did not have an Android phone at the time, so I had to wait for the iOS version to come out last week before joining. Funny thing is that just after that I had a reason to switch, and now I have an Android phone on order so the iPhone will become a permanent dash cam in my car.
Comma.ai will ship a $999 autonomous driving add-on by the end of this year