https://www.vice.com/en_us/article/dygbmj/how-google-coronavirus-contact-tracing-feature-update

On Friday, Apple and Google announced they were working on a system that would make it easier for apps from country's health departments to trace the spread of coronavirus while aiming to preserve privacy. The system is designed to use bluetooth low energy to inform a user when they've been in close contact with someone who has self identified as having tested positive for the coronavirus.

This approach will only be effective if the vast majority of people opt into it and are able to get it on their phones, which is one reason Apple and Google are implementing the feature at the operating system level and are letting it work cross-platform. But Android is infamous for having a patchy at best update cycle, with some devices receiving updates and others going without. So how is the company going to push this feature out?