Scientists suggest that, if 60% of people adopt a contact tracing app, the pandemic could be brought under control. This video discusses how we should be able to stop the spread and get us to reopening reasonably quickly. The NYTimes article:
I do not have any financial interest in the app I am recommending (NOVID.org). I am recommending it because I believe it is our best option to get the pandemic under control, although other apps are certainly helpful as well. The challenge with the Google/Apple approach is that, while NOVID offers visibility for up to 12 connections away, Google/Apple only offer 1 degree, which I believe to be insufficient to curb the spread.
NOVID is secure and, once the pandemic is under control, can simply be deleted.