I don't see the point of this app. I don't look at my cell phone while driving, and I would not expect any safe drivers to do so either. The exception is at traffic lights, and the warning goes off when you stop.
People mount their phones to the corner of their windshields or the venter of their dash not from eyesight so they can see the navigation directions without looking completely away from the road.
The GPS tracking must be calculating the speed of the car so you know that is going to be extremely reliable.
It also talks to you so you don’t have to watch it. It can replace your GPS too. When we go on trips, I’m riding shotgun so I keep an eye on it. It’s been very useful. Can also be used as a modern day cb radio. If you get in a traffic jam and see a wazer up ahead, you can send a message and find out what’s going on.