The COVIDWISE app uses Bluetooth to anonymously detect potential exposures and is free to download.
The regulator said it was not satisfied with Google's offer to silo Fitbit-collected data so that it could not be used for advertising purposes.
Exposure Notification tools are supporting apps live in 16 countries and are also being explored by 20 U.S. states and territories, Google announced.
This week's top stories include hospitals scrambling to comply with the requirement to submit data to HHS, and Google and Apple's contact tracing app leaving the door open for tracking user locations.
Google says that the apps don't have user access to location data, but health bodies using the technology for their digital tools still aren't pleased.
The Health Service Executive in Ireland has indicated that the COVID-19 tracker app will be downloadable from Google and Apple app stores, subject to final government approval.
This news comes a little over a month after the UK said it would opt for a centralized contact-tracing model in lieu of Apple-Google's decentralized one.
The past weeks have seen a wave of health tech companies pledging support to anti-racism protesters, as well as public pressure for clear action steps.
A new CB Insights report lays out the role of the FAMGA companies in healthcare and what could be next for each.
Opt-in "Exposure Notifications" are included in new operating system updates on both companies' platforms and available now to worldwide public health agencies.