"Qatar has continued to make a Covid-19 tracing app mandatory even as the kingdom has relaxed its lockdown, and despite security loopholes that exposed the personal information of more than a million users. Being caught outside without a phone carrying the app is punishable by a fine of up to £43,000 or up to three years in jail.

In Hangzhou, a Chinese city of 10 million people, authorities announced last month that they would seek to expand their coronavirus app to gather more comprehensive health and personal data.

Under the proposal, an individual’s status would be colour-coded and scored out of 100 based on medical records as well as other lifestyle choices such as smoking, drinking alcohol, or hours slept."

https://www.theguardian.com/world/2020/jun/18/coronavirus-mass-surveillance-could-be-he...

In Australia, people continue to download the tracking app (over 50%). In all the time it's been used, it's resulted in zero cases of virus detection in Victoria - the second most populous state. Can't find any info for the other states but it's probably zero as well.

So if it's not working as a virus tracking app then you have to ask why go to all this expense to implement it?