@Janevaljane This is for you. Read it- it might save a life or more.
What can the app do?
The app can detect when a fellow app user is nearby.
When two phones running the app are near each other, they will make contact through Bluetooth.
If they are close for a long enough time, and one of the two owners later shares a positive coronavirus test via the app, then the other will receive an alert.
Contact tracing app
You can also use the app to check in at venues - for instance, shops, bars, restaurants or places of worship.
Hospitality venues such as pubs and restaurants will be asked to display posters with a QR code, which app users will be able to scan.
The posters will also go up in communal areas of community buildings such as universities, hospitals and libraries.
Used alongside manual contact tracing, the app will help identify close contacts of a user who tests positive, or visitors to a premises that has suffered an outbreak.
Northern Ireland launched an app in July, while Scotland's app was launched in September.
How has contact tracing been carried out until now?
People who display coronavirus symptoms and test positive have been contacted by text, email or phone. England's NHS Test and Trace service calls only from 0300 0135 000.
They are asked to log on to the NHS Test and Trace website and give personal information, including:
name, date of birth and postcode
who they live with
places they visited recently
names and contact details of people they have recently been in close contact with
Close contacts are:
people you've spent 15 minutes or more with - at a distance of less than 2m (6ft)
sexual partners, household members or people you have had face-to-face conversations with - at a distance of less than 1m
Contact must have taken place within a nine-day period, starting 48 hours before symptoms appeared.
No-one who is then contacted will be told your identity.