Report Details How Apple and Google Developed Contact Tracing API

Apple and Google developed their upcoming COVID-19 contact tracing tool in record time, according to a new report from CNBC that details how the two companies came together to create the API.

apple google contact tracing slide
It took Apple under a month to flesh out the project, and in the beginning stages, it was the work of a handful of employees who had started brainstorming a solution to help prevent the spread of COVID-19 back in March.

The speed at which the tool was developed was "highly unusual" for Apple, according to CNBC, spearheaded by employees who wanted to create a decentralized contact tracing solution that used Bluetooth in the background, didn't draw much battery life, and was focused on privacy.

The initial team focused on an opt-in solution that would send anonymous alerts to other phones it had been nearby rather than uploading the information to a government or central authority to prevent databases with detailed location or proximity info from being built, which are all features of the finished product.

Time was of the essence given the quick spread of COVID-19, and it didn't take long for the project to pick up speed with engineers volunteering their time. Meanwhile, employees at Google were also working on something similar, and team members from both Apple and Google ultimately communicated with one another and found a solution for working together.

Within a few weeks, the Apple project - code-named "Bubble" - had dozens of employees working on it with executive-level support from two sponsors: Craig Federighi, a senior vice president of software engineering, and Jeff Williams, the company's chief operating officer and de-facto head of healthcare. By the end of the month, Google had officially come on board, and about a week later, the companies' two CEOs Tim Cook and Sundar Pichai met virtually to give their final vote of approval to the project.

Apple is said to be aiming to launch its contact tracing tool, now called exposure notification, on May 1 in a software update. Apps that use Apple's exposure notification API will run on the iPhone 6s and later and will be able to communicate not only with iPhones, but also with Android devices, with the goal of informing users if they've been exposed to COVID-19.

CNBC's full report, which goes much more into depth on the development of the partnership and the work on the tracing technology, can be found on CNBC's website.

Popular Stories

iOS 26

6 New Things Your iPhone Can Do in iOS 26.1

Wednesday October 29, 2025 4:22 am PDT by
Apple is about to drop iOS 26.1, the first major point release since iOS 26 was rolled out in September, and there are at least six notable changes and improvements to look forward to. We've rounded them up below. Apple has already provided developers and public beta testers with the release candidate version of iOS 26.1, which means Apple will likely roll out the update to all compatible...
ios 26 1 slide to stop

iOS 26.1 Brings Back 2007 Feature in New Way

Friday October 31, 2025 1:40 pm PDT by
The upcoming iOS 26.1 update includes a small but helpful change for iPhones, and it could prevent you from running late to something important. Specifically, when an alarm goes off in the Clock app, there is a new "slide to stop" control on the screen for turning off the alarm. On previous iOS 26 versions, there is simply a large "stop" button, which could be accidentally tapped. The new ...
iOS 26

iOS 26.1 Coming Soon: New Features for Your iPhone and Release Date

Monday October 27, 2025 7:55 am PDT by
The upcoming iOS 26.1 update includes a handful of new features and changes for iPhones, including a toggle for changing the appearance of the Liquid Glass design, "slide to stop" for alarms in the Clock app, and more. Below, we outline key details about iOS 26.1. Release Date Given that Apple has yet to seed an iOS 26.1 Release Candidate, which is typically the final beta version, the...
M5 MacBook Pro

Waiting for New Macs? Apple Just Shared Bad News

Friday October 31, 2025 7:32 am PDT by
Apple has just given a strong indication that it will not be releasing any additional new Macs for the remainder of the year. Apple's CFO Kevan Parekh dropped the hint during the company's earnings call on Thursday:On Mac, keep in mind, we expect to face a very difficult compare against the M4 MacBook Pro, Mac mini, and iMac launches in the year-ago quarter.Parekh essentially gave a heads up ...
iPhone 17 Pro Cosmic Orange

8 Reasons to Wait for Next Year's iPhone 18 Pro

Thursday October 30, 2025 4:42 am PDT by
Apple's iPhone development roadmap runs several years into the future and the company is continually working with suppliers on several successive iPhone models at the same time, which is why we often get rumored features months ahead of launch. The iPhone 18 series is no different, and we already have a good idea of what to expect for the iPhone 18 Pro and iPhone 18 Pro Max. One thing worth...
maxresdefault

Apple TV 4K Could Still Launch Before 2025 Ends: All the Rumored Features

Monday October 27, 2025 4:51 pm PDT by
Apple is designing an updated version of the Apple TV 4K, and rumors suggest that it could come out sometime in the next couple of months. We're not expecting a major overhaul with design changes, but even a simple chip upgrade will bring major improvements to Apple's set-top box. Subscribe to the MacRumors YouTube channel for more videos. We've rounded up all the latest Apple TV rumors. ...
ipad mini 7 feature blue

OLED iPad Mini: Release Date, Pricing, and What to Expect

Wednesday October 29, 2025 7:13 am PDT by
Rumors are stoking excitement for the next-generation iPad mini that Apple is reportedly close to launching. So what should we expect from the successor to the iPad mini 7 that Apple released over a year ago? Read on to find out. Processor and Performance Apple is working on a next-generation version of the iPad mini (codename J510/J511) that features the A19 Pro chip, according to...
iOS 26

Apple Seeds iOS 26.1, iPadOS 26.1, and macOS Tahoe 26.1 Release Candidates

Tuesday October 28, 2025 1:07 pm PDT by
Apple today provided developers and public beta testers with the release candidate versions of upcoming iOS 26.1, iPadOS 26.1, macOS Tahoe 26.1, tvOS 26.1, watchOS 26.1, and visionOS 26.1 updates for testing purposes. The RCs betas come a week after Apple released the fourth betas. The new betas can be downloaded from the Settings app on a compatible device by going to General > Software...
apple tv hd

Apple Launched Its Big New Vision for TV 10 Years Ago Today

Thursday October 30, 2025 8:58 am PDT by
Apple launched the Apple TV HD, the Siri Remote, tvOS, and their accompanying App Store a decade ago today, marking a major overhaul of the device. The new vision for the Apple TV was unveiled on September 9, 2015 during Apple's "Hey Siri" event in San Francisco, where CEO Tim Cook introduced the device with the statement, "The future of TV is apps." The announcement represented a major...

Top Rated Comments

Trik Avatar
72 months ago
Anonymized data with user consent is the right way to do this. If you have Tik Tok installed on your phone, but you think this is "too much" you really need to re-evaluate where your trust lies.
Score: 37 Votes (Like | Disagree)
Rubik Avatar
72 months ago

and the data is aggregated and Google sells it to whoever. What will do Apple with the data? Pass to?
The data will never touch Apple‘s or Google‘s servers. It stays on your device. So there is nothing to sell. Only if you were infected and consented, your random beacon codes that were broadcasted via Bluetooth will be uploaded to a centralized place (which probably still won‘t be a Google or Apple server).
Score: 16 Votes (Like | Disagree)
Pistol Peto Avatar
72 months ago
The faster this gets into people's phones (+ higher testing availability) the faster this will be over. If goverments allow this (UK just said no) it will be one of the best applications of smart phones ever.
Score: 14 Votes (Like | Disagree)
jonblatho Avatar
72 months ago

Anonymized is being used so heavily in every article.

I'll try again, anonymized would assume you can't discover the origin device. You literally have to for this to work. That means somewhere device id = anonymized id. You can change the anonymous id every five minutes but it still has to be in a table somewhere that said id at this time belongs to device id. That's the only way you are notified.

In advertising that's anonymized and what everyone keeps touting you don't need to store device id = advertising id anywhere. The data never has to make it back to the origin device because you just want the data.

Do you see the difference? Somewhere there is a record that has to keep track of the device. You are trusting this joint rushed operation has safeguards in place that someone won't be able to access that data. In the advertising world that data literally isn't there so its safe.
That’s a lot of words to say that you have no clue what you’re talking about because you haven’t read the specification.
Score: 11 Votes (Like | Disagree)
cocky jeremy Avatar
72 months ago
Still a hard pass. I don't care if it was only Apple working on this.
Score: 8 Votes (Like | Disagree)
AngerDanger Avatar
72 months ago
I just realized how great this illustration is:



Flop sweat drips from Bob's uneven hairline as he sits bored, balancing a notchless smartphone in his hand with the screen faced away and the classic "App" app open. Not even his pencil 'stache distracts from the oddity.

Attachment Image
Score: 7 Votes (Like | Disagree)