Apple has designed a new algorithm that Apple Watch uses to measure electrocardiogram (ECG) waves, according to developer documentation for the iOS 14.3 and watchOS 7.2 betas.
In the official documentation, a new "version 2 algorithm" declaration has been added. No other information is included.
The ECG feature includes irregular heart rhythm detection, which intermittently measures the user's heart rate in the background and sends a notification if it detects an anomaly it categorizes as atrial fibrillation, which can be a serious heart arrhythmia condition.
Based on beta code uncovered by MacRumors, it's likely that the new algorithm will allow the ECG app to check for atrial fibrillation (AFib) at higher heart rates - during exercise, for example.
iOS 14.3 will introduce support for Apple Fitness+, Apple's upcoming fitness service that will work with the Apple Watch, plus it brings a new Cardio Fitness feature that lets you know if your VO2Max levels are low. VO2Max is a useful measurement of overall fitness and heart health.
iOS 14.3 is set to be released on Monday, December 14, which is also the day that Apple Fitness+ is coming out.
Monday September 22, 2025 12:44 pm PDT by Juli Clover
Apple released the first beta of iOS 26.1 today, just a week after launching iOS 26. iOS 26.1 mainly adds new languages to Apple Intelligence, but there are a few other features that are worth knowing about.
New Apple Intelligence Languages
Apple Intelligence is now available in Danish, Dutch, Norwegian, Portuguese (Portugal), Swedish, Turkish, Chinese (Traditional), and Vietnamese.
AirPo...
Wednesday September 24, 2025 3:58 pm PDT by Juli Clover
With the iPhone 15 series, I did an experiment and kept my iPhone's Charge Limit set at 80 percent for an entire year. It provided an interesting look at the impact of charge limits on battery longevity, so I decided to repeat it for the iPhone 16 line.
Since September 2024, my iPhone 16 Pro Max has been limited to an 80 percent charge, with no cheating. As of today, my battery's maximum...
Tuesday September 23, 2025 8:55 am PDT by Joe Rossignol
While the iPhone 18 Pro and iPhone 18 Pro Max are still a year away, there are already a few rumors about the devices that offer an early look ahead.
Below, we have recapped some of the early iPhone 18 Pro rumors so far. This story was published previously, and it has been updated to reflect the latest rumors.
Many early rumors prove to be true, but nothing is confirmed yet, and Apple's...
Monday September 22, 2025 10:00 am PDT by Joe Rossignol
The next Apple TV is expected to be released later this year, and a handful of new features and changes have been rumored for the device.
Below, we recap what to expect from the next Apple TV, according to rumors.
Likely Features
N1 Chip With Wi-Fi 7
Last year, Bloomberg's Mark Gurman said the next Apple TV would be equipped with Apple's own combined Wi-Fi and Bluetooth chip, which is...
Wednesday September 24, 2025 10:22 am PDT by Juli Clover
The marks on the iPhone 17 Pro models that people have noticed at Apple retail stores are caused by the chargers that Apple uses, Apple confirmed today.
Apple told 9to5Mac that worn MagSafe charging stands in stores are causing marks on the iPhone 17 Pro and iPhone 17 Pro Max. Apple says that the marks are not scratches, and are instead material transfer from the stand to the phone. The...
Monday September 22, 2025 7:29 am PDT by Joe Rossignol
The website ChargerLAB has tested the iPhone 17 Pro Max's USB-C charging speeds with a variety of Apple's chargers, from 18W to 140W.
The device reached a peak charging speed of around 36W with the following Apple chargers:40W Dynamic Power Adapter with 60W Max
61W USB-C Power Adapter
67W USB-C Power Adapter
70W USB-C Power Adapter
96W USB-C Power Adapter
140W USB-C Power AdapterFor...
Tuesday September 23, 2025 1:06 pm PDT by Juli Clover
Digital ID, the iOS 26 feature that lets U.S. passport holders add their passports to the Wallet app, is coming later in 2025, Apple confirmed today.
Apple updated the release timing wording of Digital ID on its iOS 26 features page. "Digital ID will be coming later this year with US passports only," it reads.
Prior to today, the footnote for the feature said "Digital ID will be available ...
Wednesday September 24, 2025 7:20 am PDT by Joe Rossignol
Apple's annual "Back to School" promotion for students ends soon, so act fast if you want to score free AirPods with the purchase of an eligible new Mac or iPad.
Until Tuesday, September 30, college students and qualifying educational staff in the U.S. can receive free AirPods 4 with Active Noise Cancellation when they purchase an eligible new Mac or iPad from Apple. This is a $179 value.
...
Monday September 22, 2025 11:15 am PDT by Juli Clover
With iOS 26.1, Apple Intelligence is gaining support for additional languages, including Danish, Dutch, Norwegian, Portuguese (Portugal), Swedish, Turkish, Chinese (Traditional), and Vietnamese.
Apple announced plans to expand the languages that can be used with Apple Intelligence last year, and now the added language support is here. Apple Intelligence is now available in the following...
Tuesday September 23, 2025 2:18 pm PDT by Juli Clover
Early reports have suggested that the iPhone 17 Pro and iPhone Air are more vulnerable to scratches and scuffs, primarily due to damage spotted at Apple Stores.
Apple customers have discovered that the iPhone Air and iPhone 17 Pro models Apple has out for display at its retail locations have scratching in the area of the MagSafe charger. Those devices are handled by hundreds to thousands of...
Wait what? The ECG only works when your finger is on the Digital Crown. It can’t work in the background.
The background irregular heart rhythm detection does not use the ECG but it is grouped with the ECG features (which is technically inaccurate but they are related features, just different technologies). It's been around as long as the ECG: "Using the optical heart sensor in Apple Watch Series 1 or later, the irregular rhythm notification feature will occasionally check the user’s heart rhythm in the background for signs of an irregular heart rhythm that appears to be AFib and alerts the user with a notification if an irregular rhythm is detected on five rhythm checks over a minimum of 65 minutes." (https://www.apple.com/newsroom/2018/12/ecg-app-and-irregular-heart-rhythm-notification-available-today-on-apple-watch/)
Still waiting for ECG in Japan! Any news about it?
Since ECG received final medical approval in Japan this September, I guess maybe iOS 14.3 will cover ECG functionality also Japan as well? *finger-crossed*
