When you answer questions about your symptoms, the app uses this information to work out whether or not your symptoms mean you may have coronavirus (COVID-19).  If they do, the app will give you information about what to do, including self-isolating and booking a test.   The app will also send the first half of your postcode to the Joint Biosecurity Centre. This is to help the NHS track where the virus may be spreading, and get early insight into potential hotspots.

Read more about how we use the first half of your postcode.