The Australian government is developing a mobile phone app with the private sector to monitor Australians' daily interactions https://www.abc.net.au/news/2020-04-14/coronavirus-app-government-wants-australians-to-download/12148210
“It is understood the app would use a phone's GPS data to plot who had spent 15 minutes or more in close proximity with a person who proves to be COVID-19 positive”
“The ABC understands the app will be ready in a fortnight but the Government believes it would need at least 40 per cent of Australians to voluntarily sign up for it to be effective.” cc. @jpwarren @Lizzie_OShea @Zemmiph0bia