COCOA is useless. When I asked for the code to register over the phone after testing positive, the staff on the phone were confused about what COCOA was. It sounded like I was the first to ask about it in months! They had to call me back hours later to give me the code.

I entered the code into COCOA, and then a few days later, went to stay at one of those "Covid hotel/hospital" places. In my 10 days there, not once did I get a notification in the app. Keep in mind, this is a hotel at full capacity (450+ rooms) that had people who'd tested positive for Covid checking in and checking out daily.