https://techcrunch.com/2020/05/20/apple-and-google-launch-exposure-notification-api-enabling-public-health-authorities-to-release-apps/

Apple and Google today made available the first public version of their exposure notification API, which was originally debuted as a joint-contact tracing software tool. The partners later renamed it the Exposure Notification system to more accurately reflect its functionality, which is designed to notify individuals of potential exposure to others who have confirmed cases of COVID-19, while preserving privacy around identifying info and location data.

The launch today means that public health agencies can now use the API in apps released to the general public. To date, Apple and Google have only released beta versions of the API to help developed with the development process.