AliveCor Files Antitrust Suit Against Apple for Preventing Third-Party Irregular Heart Rhythm Analysis on Apple Watch

AliveCor, a company that that has developed an ECG 'KardiaBand' for the Apple Watch, today filed an antitrust lawsuit against Apple that accuses the Cupertino company of "monopolistic conduct."

Kardia Band apple watch
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."

AliveCor claims that the SmartRhythm app was initially allowed in the App Store, but Apple later claimed that it violated ‌App Store‌ guidelines. AliveCor says that it was forced to adapt SmartRhythm multiple times to adjust to Apple's rules, and then Apple "made changes to watchOS's heart rate algorithm" to ensure that SmartRhythm and other competing apps would not work. Apple allegedly changed the heart rate algorithm in watchOS 5 to prevent third-party apps from being able to identify irregular heart rate situations.

The algorithm was virtually the same on the first four versions of watchOS, but, with the introduction of the Series 4 Apple Watch and Apple's introduction of its competing heartrate analysis app, Apple released watchOS5, which, among other things, "updated" the Watch's heartrate algorithm. That update did not improve the user experience for Apple Watch purchasers; instead, its purpose and effect was simply to prevent third parties from identifying irregular heartrate situations and, thus, from offering competing heartrate analysis apps.

Prior to Apple's alleged sabotage, AliveCor says that its SmartRhythm app was "simply better at identifying worrisome heart-related health events," and could have successfully competed with the ECG function built into the Apple watch. AliveCor was forced to pull SmartRhythm from the ‌App Store‌ because the irregular rhythm functionality no longer worked.

All of this has been devastating to competition, as Apple today commands 100% share of heartrate analysis apps on watchOS devices and, if viewed in the alternative as part of either the U.S. ECG-capable smartwatch or U.S. ECG-capable wearable devices market, over 70% market share. With a single update, Apple thus eliminated competition that consumers clearly wanted and needed, depriving them of choice for heartrate analysis that is better than what Apple can provide.

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, and with today's antitrust suit, AliveCor is seeking damages and an injunction that would require Apple to "cease its abusive conduct."

This is just one of several antitrust battles that Apple is facing. A high-profile lawsuit brought by Epic Games wrapped up earlier this week, and there are also antitrust investigations into Apple's ‌App Store‌ fees in the UK and in the United States, among other countries.

Popular Stories

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 ...
Intel Inside iPhone Feature

Apple's Return to Intel Rumored to Extend to iPhone

Friday December 5, 2025 10:08 am PST by
Intel is expected to begin supplying some Mac and iPad chips in a few years, and the latest rumor claims the partnership might extend to the iPhone. In a research note with investment firm GF Securities this week, obtained by MacRumors, analyst Jeff Pu said he and his colleagues "now expect" Intel to reach a supply deal with Apple for at least some non-pro iPhone chips starting in 2028....
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...
Johny Srouji

Apple Chip Chief Johny Srouji Could Be Next to Go as Exodus Continues

Sunday December 7, 2025 10:41 am PST by
Apple's senior vice president of hardware technologies Johny Srouji could be the next leading executive to leave the company amid an alarming exodus of leading employees, Bloomberg's Mark Gurman reports. Srouji apparently recently told CEO Tim Cook that he is "seriously considering leaving" in the near future. He intends to join another company if he departs. Srouji leads Apple's chip design ...
top stories 2025 12 04a

Top Stories: iOS 26.2 Coming Soon, Apple Execs Depart, and More

Saturday December 6, 2025 6:00 am PST by
You'd expect things to be starting to wind down for the holidays by now, but that doesn't seem to be the case yet in the world of Apple news, with Apple just about ready to release iOS 26.2 and other operating system updates to the public. There was also a flurry of news this week about Apple executive departures, some expected and some not so expected, while we also learned that Apple and...
maxresdefault

iPhone Fold: Launch, Pricing, and What to Expect From Apple's Foldable

Monday December 1, 2025 3:00 am PST by
Apple is expected to launch a new foldable iPhone next year, based on multiple rumors and credible sources. The long-awaited device has been rumored for years now, but signs increasingly suggest that 2026 could indeed be the year that Apple releases its first foldable device. Subscribe to the MacRumors YouTube channel for more videos. Below, we've collated an updated set of key details that ...
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....

Top Rated Comments

thisisnotmyname Avatar
59 months ago

Send your complaint to the FDA.
They did get FDA approval per the article but their complaint is that they are dependent upon Apple devices to trigger their own device's operation and Apple has changes its API so they can no longer trigger that process. If I were making a medical device that was dependent on Siemens imaging equipment to trigger my operation I wouldn't be at all surprised if Siemens unilaterally changed their interfaces either. That would have been a risk I took on by making my device dependent upon another manufacturer without contractual agreements in place to support said interface. They're taking a shot in the courts but it won't work out in their favor.

edit: typo
Score: 44 Votes (Like | Disagree)
calikid78 Avatar
59 months ago
It's nuts. You build your own platform, O/S and now you get sued because you won't give everyone access to your proprietary, hard work. Sounds like all these idiots should go invent their own tech and O/S and stop complaining about Apple's.
Score: 39 Votes (Like | Disagree)
nattK Avatar
59 months ago
Is suing Apple a trendy thing right now? It feels like everyone and their grandmother are out suing Apple nowadays.
Score: 37 Votes (Like | Disagree)
Mebsat Avatar
59 months ago
So Apple is using its monopoly power to dominate the Apple Watch ECG market?
Score: 37 Votes (Like | Disagree)
WiseAJ Avatar
59 months ago
Yeah Apple clearly copied them, because it's not like they were working for years on the ecg function for the Apple Watch and got it designed and FDA approved in under a year. :rolleyes:.

They need to start handing out shirts that say "I sued Apple and all I got was this T-Shirt"

This is getting ridiculous.
Score: 27 Votes (Like | Disagree)
swingerofbirch Avatar
59 months ago
What's sad is that AliveCor actually is better, too.

They've been doing this for a long time. Their a-fib detection is superior because it actually analyzes rates that are typical for a-fib, whereas Apple caps their detection to low pulse rates. AliveCor's algorithms have gotten really good and are approved for more diagnoses by the FDA than Apple's.

Tim Cook talks about reading letters of people's lives he's saved, and then they cut out a competitor that actually has a better and less expensive product. How many lives has that impacted?
Score: 22 Votes (Like | Disagree)