Nexar is a new company to me, but they have a significant presence in the US with a particular focus on NYC (though they are an Israeli company).

Nexar is built around its AI app, and the hardware they sell is reliant on this, which is quite a bit different than your standard dashcam which is not dependent upon an app, and cheaper models lack an app altogether. In fact, it is possible to use Nexar without any other hardware, if you can mount the phone with the camera having a clear view of the road it is possible to use this as the primary dash camera.
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Read full post here:
https://mightygadget.co.uk/nexar-dash-cam-review-an-app-reliant-dash-cam-with-free-cloud-storage/