The NHS COVID-19 app will be available nationally across England and Wales on Thursday 24 September.
The app will let people scan barcode-like QR codes to register visits to hospitality venues and will implement Apple and Google's method of detecting other smartphones.
For more information on the app, go to https://covid19.nhs.uk/
For FAQs on the app, go to https://faq.covid19.nhs.uk/
For information on the types of businesses that will be displaying the QR code for the app, and more about what businesses are required to do, click here.