Apple to Face Claims it Bars Third-Party Heart-Rate App Functionality on Apple Watch

Apple must face claims it illegally monopolized the U.S. market for heart-rate monitoring apps on Apple Watch, a California-based federal judge said on Monday.

Kardia Band apple watch
AliveCor, a company that that markets an ECG "KardiaBand" for the Apple Watch, filed an antitrust lawsuit against Apple in May 2021 accusing the Cupertino company of changing the heart-rate algorithm for the Apple Watch to gain an "unfair competitive edge" over rivals while endangering the lives of AliveCor users.

According to AliveCor, Apple's decision to exclude third-party heart-rate analysis providers from the Apple Watch has harmed AliveCor and impacted patients and consumers. To go along with the KardiaBand, AliveCor created the SmartRhythm app, which uses data from the Apple Watch's heart-rate algorithm to determine when a heart rate is irregular and suggest people take an ECG with the KardiaBand.

The KardiaBand received FDA approval in 2017, and in 2018, Apple debuted the Apple Watch Series 4 with built-in ECG capabilities and its own irregular heart rhythm notifications followed. AliveCor claims that Apple saw the success of the KardiaBand and changed the functionality of watchOS to sabotage KardiaBand and "corner the market for heart rate analysis on Apple Watch."

According to the latest report from Reuters, U.S. District Judge Jeffrey White said Monday that AliveCor could try to prove that Apple violated federal antitrust law based on its alleged "complete control" over the market for such apps.

"AliveCor alleges that Apple made changes to the heart rate algorithm that made it effectively impossible for third parties to inform a user when to take an ECG," or electrocardiogram, White wrote. "Plaintiff's allegations plausibly establish that Apple's conduct was anticompetitive."

However, White dismissed AliveCor's separate claim that Apple maintained an illegal monopoly over ECG-capable smart watches, because AliveCor's KardiaBand wristband "complements but does not compete" in that market, he said.

Apple and its lawyers have yet to respond to the judgement. AliveCor has previously filed several patent infringement lawsuits against Apple, alleging that Apple copied AliveCor's cardiological detection and analysis technology. Those lawsuits have not yet been resolved, while today's judgement allows AliveCor to seek damages and pursue the possibility of an injunction that would require Apple to cease its perceived monopolistic conduct.

Popular Stories

Foldable iPhone 2023 Feature 1

Apple to Make More Foldable iPhones Than Expected

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 ...
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...
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...
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 17 Pro Cosmic Orange

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

Monday December 1, 2025 2:40 am PST 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...
Johny Srouji

Apple's Chipmaking Chief Johny Srouji Responds to Report About Him Potentially Leaving

Monday December 8, 2025 9:23 am PST by
Apple's chipmaking chief Johny Srouji has reportedly indicated that he plans to continue working for the company for the foreseeable future. "I love my team, and I love my job at Apple, and I don't plan on leaving anytime soon," said Srouji, in a memo obtained by Bloomberg's Mark Gurman. Here is Srouji's full memo, as shared by Bloomberg:I know you've been reading all kind of rumors and...
google pixel 10

Switching Between iPhone and Android Will Get Easier With New Apple and Google Collaboration

Monday December 8, 2025 11:10 am PST by
Apple and Google are teaming up to make it easier for users to switch between iPhone and Android smartphones, according to 9to5Google. There is a new Android Canary build available today that simplifies data transfer between two smartphones, and Apple is going to implement the functionality in an upcoming iOS 26 beta. Apple already has a Move to iOS app for transferring data from an Android...
Apple Fitness Plus expansion hero

Apple Fitness+ Coming to 28 New Regions With Digital Voice Dubbing

Monday December 8, 2025 6:19 am PST by
Apple today announced that Fitness+ is expanding to 28 new markets on December 15 in the service's largest international rollout since launch, accompanied by new language dubbing and a K-Pop music genre. Apple Fitness+ will become available in Chile, Hong Kong, India, the Netherlands, Singapore, Taiwan, and additional regions on December 15, with Japan scheduled to follow early next year....
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...

Top Rated Comments

RadioHedgeFund Avatar
49 months ago
In other news:

Shell have announced they are sueing Tesla for making their cars run on electricity, thereby cutting Petroleum companies off from the fuel market. A Shell press release stated, "By making their automobiles charge exclusively by electricity, often from their own charge points Tesla makes it impossible for Petroleum companies to access that marketplace, effectively monopolising the fuel marketplace."
Score: 41 Votes (Like | Disagree)
bartmoss Avatar
49 months ago
1. Create something. Doesn't matter what.
2. Sue Apple for any reason.
3. Hope Apple settles your nuisance lawsuit.
4. Profit
Score: 15 Votes (Like | Disagree)
PutTheFBackIn Avatar
49 months ago
I wonder if Apple’s legal team will wear Apple Watches to the hearings.
Score: 11 Votes (Like | Disagree)
SoldOnApple Avatar
49 months ago
I'm glad Facebook can't monitor for changes in my heart rate when I'm browsing posts.
Score: 10 Votes (Like | Disagree)
MauiPa Avatar
49 months ago
So, "you make a product, I have a fundamental right to use my product with yours" Does that some it up? Does alivecor allow Apple Watch and apple products on what it makes?

I wish someone would intelligently describe the reason why any manufacturers would be required to work with any other company's products, barring a contract of course. I mean I can clearly see the appeal of it, but the legal requirement? Does my Kindle have to work with other book stores? Can we sue TV manufacturers that don't allow Airplay and Google play and Roku streaming?
Score: 10 Votes (Like | Disagree)
LeeW Avatar
49 months ago
My only view on this is that it is an Apple device with its own specific monitoring system and software. Not really about a monopoly but holding Apple to account for their specific device/software. I would be wary about a 3rd party trying to use it.
Score: 8 Votes (Like | Disagree)