If that's directed to me, I can't speak to the specific apps. What I can speak to is that at Google, what we'll be exchanging is anonymous Bluetooth beacon information that enables the apps to identify and then notify individuals who have been in proximity to each other. As for the apps themselves, it will be up to the public health authorities to decide what sort of information they are going to request from users.
I will note, however, that we've made it a specific requirement of using our exposure notification API that app developers cannot request personal information; they can't associate it with the Bluetooth information. They also cannot request specific location information from the device alongside the exposure notification API.
What that means in practice is that there could be an app that only interacts with the API, then a separate app that does a lot more on behalf of the public health authority. That would be separate from Google services.