https://techcrunch.com/2020/04/23/first-version-of-apple-and-googles-contact-tracing-api-should-be-available-to-developers-next-week/

The first version of Apple and Google’s jointly developed, cross-platform contact tracing API should be available to developers as of next week, according to a conversation between Apple CEO Tim Cook and European Commission for internal market Thierry Breton. Bretton shared a photo from his office which shows him having a video conversation with Cook, and told Les Echos that the Apple chief executive told him April 28 would be the day the contact tracing API will be available to software developers building apps that employ it on behalf of public health agencies.

Apple and Google announced that they were working on the contract tracing system, which works across iOS and Android mobile device, on April 10, and detailed how the opt-in network would use randomized IDs not tied to a user’s actual identify information to communicate potential contacts with individuals with a confirmed positive COVID-19 diagnosis. It’s a decentralized system that never collects any geographic data in order to preserve individual privacy, and Apple and Google chose to collaborate on the project so that any apps built to use it will have the furthest potential reach possible in terms of user base.