https://techcrunch.com/2020/05/04/apple-and-google-release-sample-code-and-detailed-policies-for-covid-19-exposure-notification-apps/

Apple and Google are providing additional resources for developers working with the first version of their Exposure Notification API, the development tools the companies have created and are working on in order to provide a cross-platform way for public health agencies to notify individuals of a potential exposure to a person with a confirmed case of COVID-19.

The first version of the Exposure Notification API, which Apple and Google renamed from the ‘Contact Tracing API’ to more accurately reflect its actual use and purpose, was released to developers last week along with beta updates of iOS and Xcode. Today, Apple and Google are providing new sample resources for developers, including example UI assets, and sample code for both iOS and Android. These are designed as starting points that developers working on behalf of public health agencies can use to jumpstart their app development process.