Instead of spouting nonsense, you should find Apple's website and see what they are actually doing.
Your phone will gather codes from phones (Android and iPhone) nearby, that cannot be used in any way to find the owner of the phone. The codes change every fifteen minutes, so nobody can even use these codes where someone has been during a day. And if the owner of one of these phones is informed that they have COVID-19, then they press a button, and all the other phones are informed that they were nearby someone who know has COVID-19 and take action.
Only the owners of these phones can do anything, and the only thing the are told is that at some point, they were near to the wrong person. Nobody ever knows anyone's identity, and nobody can ever find out.
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That's also a problem the other way round. In the UK, if we had locked down 4 weeks earlier, we wouldn't have 18,000 dead but 1,800. But then the visible cost of lockdown divided by 1,800 would be ten times higher than cost of lockdown divided by 18,000. So the politicians saving 16,200 lives could say goodbye to any reelection.
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Technical specification is here:
Contact Tracing makes it possible to combat the spread of the COVID-19 virus.
www.apple.com
Warning: It's a technical specification. It's aimed at software developers, not the general public. I skimmed through the API documentation, which is purely for iOS developers, and conclude that if someone paid me to write an app, I could do it easily. And it would work with any app using this API, and I suppose Google has an Android website with an Android API, and my app would work together with Google apps using the Google API as well.
France and the NHS may be kicking themselves for having wasted money to try to do this themselves.
Oh wait ...
https://www.computing.co.uk/news/4013854/nhs-apple-google-api-upcoming-covid-19-contact-tracing-app
So the NHS has confirmed they will be using this API.