No, the device will stay on and upload data after your vehicle shuts off, using the vehicles battery. It has functions to put itself to sleep when it is done. It connects to the ODB2 port which stays on when your vehicle is off.OK, fair enough. Thanks for the detailed answer.
Am I understanding you that in routine use, you would disconnect it daily and bring it inside to do the upload if you don't have a strong enough signal in your driveway?
If you have in-car wifi, then would it upload in real time if it were connected?
I haven't had an issue with WiFi connectivity in my house and the vehicle is in the garage and my wifi router is in my basement in the middle of the house. I use 5ghz. If needed you could probably connect to 2.4 ghz and it wouldn't be an issue, just upload slower.
I'm not sure it uploads in realtime if it has constant wifi. Uploads are categorized as "drives" and i'm not sure if it waits for a drive to fully finish (vehicle in Park) before uploading.
Keep in mind these are first and foremost self-driving computers in a cell phone package so CPU is limited. The reason Comma says don't necessarily rely on the dashcam stuff is it operates secondary to the self-driving function. Comma doesn't care if the data makes it to them since they just use it to improve their algorithms, so they don't necessarily have a vested interest in making sure it's 100% successful.
As for dashcam quality, the Comma3 is pretty decent quality, but no match for modern 4K dashcams. It's probably on par with mid-range dashcams fin terms of detail but the Comma 3 has a clearer lens. The Comma2 is a low end chinese cell phone so the quality isn't very good. You could use it to prove you didn't run a red light but you'd never identify a license plate with it.