I've been trying to encourage some people I know to install and use the COVIDsafe app. Some people have raised privacy concerns as a reason to not install the app (there's other concerns, such as it reportedly interfering with diabetes apps). To the best of my knowledge, these people are using smartphones with SIM cards and lots of apps installed.
I understand that privacy breaches may involve either the developer of the app, malicious third parties, the Australian government, Amazon, and the US government, however I assume that the main concern is around the Australian government.
To what extent does using the COVIDsafe app give the Australian government data that it doesn't already have from existing sources of information?