Contact tracing apps: what to look for
Apple and Google’s design for exposure notification keeps data on phones. Not every country’s app works that way.
Many countries are launching apps to warn people who were near someone with COVID-19. Apple and Google announced a shared system this month: phones swap random, rotating Bluetooth IDs, and the matching happens on the phone, not on a central server.
That design is good for privacy. Not every app uses it. Before installing one, check:
- Is matching done on the phone or on a government server?
- Does it collect location (GPS) or only Bluetooth proximity?
- Who can see the data, and for what else can it be used?
- When is the data deleted, and does the app have an end date?
- Is the code published so experts can review it?
Public health matters, and so does trust. Apps that collect the minimum will get more people to install them, and that’s what makes them work.