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

iOS 26.2 Coming Soon With These 8 New Features on Your iPhone

Thursday December 11, 2025 8:49 am PST by
Apple seeded the second iOS 26.2 Release Candidate to developers earlier this week, meaning the update will be released to the general public very soon. Apple confirmed iOS 26.2 would be released in December, but it did not provide a specific date. We expect the update to be released by early next week. iOS 26.2 includes a handful of new features and changes on the iPhone, such as a new...
Google maps feaure

Google Maps Quietly Added This Long-Overdue Feature for Drivers

Wednesday December 10, 2025 2:52 am PST by
Google Maps on iOS quietly gained a new feature recently that automatically recognizes where you've parked your vehicle and saves the location for you. Announced on LinkedIn by Rio Akasaka, Google Maps' senior product manager, the new feature auto-detects your parked location even if you don't use the parking pin function, saves it for up to 48 hours, and then automatically removes it once...
Foldable iPhone 2023 Feature 1

Apple to Make More Foldable iPhones Than Expected [Updated]

Tuesday December 9, 2025 9:59 am PST by
Apple has ordered 22 million OLED panels from Samsung Display for the first foldable iPhone, signaling a significantly larger production target than the display industry had previously anticipated, ET News reports. In the now-seemingly deleted report, ET News claimed that Samsung plans to mass-produce 11 million inward-folding OLED displays for Apple next year, as well as 11 million...
iOS 26

15 New Things Your iPhone Can Do in iOS 26.2

Friday December 5, 2025 9:40 am PST by
Apple is about to release iOS 26.2, the second major point update for iPhones since iOS 26 was rolled out in September, and there are at least 15 notable changes and improvements worth checking out. We've rounded them up below. Apple is expected to roll out iOS 26.2 to compatible devices sometime between December 8 and December 16. When the update drops, you can check Apple's servers for the ...
AirPods Pro Firmware Feature

Apple Releases New Firmware for AirPods Pro 2 and AirPods Pro 3

Thursday December 11, 2025 11:28 am PST by
Apple today released new firmware designed for the AirPods Pro 3 and the prior-generation AirPods Pro 2. The AirPods Pro 3 firmware is 8B30, up from 8B25, while the AirPods Pro 2 firmware is 8B28, up from 8B21. There's no word on what's include in the updated firmware, but the AirPods Pro 2 and AirPods Pro 3 are getting expanded support for Live Translation in the European Union in iOS...
AirTag 2 Mock Feature

Apple AirTag 2: Four New Features Found in iOS 26 Code

Thursday December 11, 2025 10:31 am PST by
The AirTag 2 will include a handful of new features that will improve tracking capabilities, according to a new report from Macworld. The site says that it was able to access an internal build of iOS 26, which includes references to multiple unreleased products. Here's what's supposedly coming: An improved pairing process, though no details were provided. AirTag pairing is already...
iOS 26

Apple Seeds Second iOS 26.2 Release Candidate to Developers and Public Beta Testers

Monday December 8, 2025 10:18 am PST by
Apple today seeded the second release candidate version of iOS 26.2 to developers and public beta testers, with the software coming one week after Apple seeded the first RC. The release candidate represents the final version iOS 26.2 that will be provided to the public if no further bugs are found. Registered developers and public beta testers can download the betas from the Settings app on...
iPhone 14 Pro Dynamic Island

iPhone 18 Pro Leak Adds New Evidence for Under-Display Face ID

Monday December 8, 2025 4:54 am PST by
Apple is actively testing under-screen Face ID for next year's iPhone 18 Pro models using a special "spliced micro-transparent glass" window built into the display, claims a Chinese leaker. According to "Smart Pikachu," a Weibo account that has previously shared accurate supply-chain details on Chinese Android hardware, Apple is testing the special glass as a way to let the TrueDepth...
ipad blue prime day

iPad 12 Rumored to Get iPhone 17's A19 Chip, Breaking Apple Tradition

Wednesday December 10, 2025 12:22 pm PST by
The next-generation low-cost iPad will use Apple's A19 chip, according to a report from Macworld. Macworld claims to have seen an "internal Apple code document" with information about the 2026 iPad lineup. Prior documentation discovered by MacRumors suggested that the iPad 12 would be equipped with an A18 chip, not an A19 chip. The A19 chip was just released this year in the iPhone 17, and...
studio display purple

Apple Studio Display 2 Code Hints at 120Hz ProMotion, HDR, A19 Chip

Thursday December 11, 2025 4:19 am PST by
Apple's next-generation Studio Display is expected to arrive early next year, and a new report allegedly provides a couple more details on the external monitor's capabilities. According to internal Apple code seen by Macworld, the new external display will feature a variable refresh rate capable of up to 120Hz – aka ProMotion – as well as support for HDR content. The current Studio...

Top Rated Comments

Trik Avatar
73 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
73 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
73 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
73 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
73 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
73 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)