How could you have a third party app on a Bolt or a Volt? There is no mechanism for installing software outside of GM's firmware on the infotainment unit, the closest thing to it is Android Auto and Car Play which run apps on a phone and utilize the car's display, speakers and microphone but not the car's camera's. Even when built in Android becomes available, the Volvo Polestar will be the first car to get it, I doubt that it would have this capability. Cameras are so specific to an individual car models, and are integral parts of driver assist and self driving systems, that it's doubtful that there will ever be an API that allows third party apps to access them.Do you know if the app is from a third party or only from GM? If from a third party, then research their website or just install the app and experiment.