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watchOS 5.1.2 Will Enable ECG App on Apple Watch Series 4

ECG functionality will be enabled on the Apple Watch Series 4 in the publicly released version of watchOS 5.1.2, which is currently in beta testing, according to an internal Apple Store training document obtained by MacRumors.


watchOS 5.1.2 will feature an Apple-designed ECG app that can indicate whether your heart rhythm shows signs of atrial fibrillation, a serious form of irregular heart rhythm, or a normal sinus rhythm. Apple Watch Series 4 is capable of generating an ECG similar to a single-lead electrocardiogram, according to the FDA.

ECG and other heart data is collected in the Health app on a paired iPhone. Apple's document lists a minimum requirement of an iPhone 5s or later running iOS 12.1.1, currently in beta testing, or later.

To take an ECG reading from the Apple Watch, users will need to place a finger on the Digital Crown while wearing the watch. The reading is completed in 30 seconds, allowing users to determine whether their hearts are beating in a regular pattern or if there are signs of atrial fibrillation.

Apple's training document states that the ECG app is regulated and only available in regions cleared for use. The app will initially be limited to the United States, where Apple has received FDA clearance, but Apple Watch Series 4 models sold worldwide include the electrical heart sensor for future expansion.

Apple Store employees are instructed to advise customers that the ECG app is "not intended to be a diagnostic device or to replace traditional methods of diagnosis," and "should not be used to monitor or track disease state or change medication without first talking to a doctor," according to Apple's document.

Apple promised that the ECG app will be available later this year, but it's unclear when watchOS 5.1.2 and iOS 12.1.1 will be released. watchOS 5.1.2 has been in beta testing since November 7, while iOS 12.1.1 has been in beta testing since October 31, so both software updates should be released relatively soon.

A separate Apple training document obtained by MacRumors suggests that irregular heart rhythm notifications will also be enabled in watchOS 5.1.2 on Apple Watch Series 1 through Apple Watch Series 4 models.

The ECG app will not be available on previous-generation Apple Watch models, including the original through Series 3.

Related Roundups: Apple Watch, watchOS 5
Tag: ECG
Buyer's Guide: Apple Watch (Buy Now)


Top Rated Comments

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2 weeks ago

I am pissed that this will not work with my Series 3!! I could really use this app. Apple has a way to make me spend money. I might be stubborn and not buy a Series 4 until refurbs come along.


Why would you be pissed? It wasn't a function when you purchased it, and it wasn't promised by apple...
Rating: 49 Votes
2 weeks ago

Am I the only one scared that my Watch will tell me I'm going to die?


You are in fact going to die.
Rating: 37 Votes
2 weeks ago
Can’t wait to see which of my hearts the ECG measures.

EDIT: None of them are showing up. Not even the ****** lower-left-quadrant one. :(



Rating: 19 Votes
2 weeks ago

Good idea. Health is a huge market and Apple is well positioned to control the wrist real estate. But, to succeed they need to make the Watch fully function with non-Apple phones and tablets.


No they don't. This is very sensitive health data, and it's not Apple's job to facilitate building a doorway for a bunch of hackneyed Android devs to screw it up and cause problems. Then Apple will be blamed for Google's failure to properly secure their platform. That's to say NOTHING of insurers, who would love to "better serve you" by accessing that and deciding how quickly they want to lobby you off their roster.
Rating: 15 Votes
2 weeks ago

No they don't. This is very sensitive health data, and it's not Apple's job to facilitate building a doorway for a bunch of hackneyed Android devs to screw it up and cause problems. Then Apple will be blamed for Google's failure to properly secure their platform. That's to say NOTHING of insurers, who would love to "better serve you" by accessing that and deciding how quickly they want to lobby you off their roster.


I completely agree. I don't want google's dirty fingers anywhere near the health app.
Rating: 13 Votes
2 weeks ago

I am pissed that this will not work with my Series 3!! I could really use this app. Apple has a way to make me spend money. I might be stubborn and not buy a Series 4 until refurbs come along.

This comment reflects poorly on you. Even I'm embarrassed. Did you also wonder why your 6s Plus never grew a second camera? Or why your iMac didn't form a cocoon and emerge as an iMac Pro? Honestly, what do you people want Apple to do—never innovate, or give you a free device upgrade every year? The entitlement never ceases to amaze me.
Rating: 11 Votes
2 weeks ago
Am I the only one scared that my Watch will tell me I'm going to die?
Rating: 10 Votes
2 weeks ago

I am pissed that this will not work with my Series 3!! I could really use this app. Apple has a way to make me spend money. I might be stubborn and not buy a Series 4 until refurbs come along.


I'm upset that the 2019 Porsche has a better engine than the 2018. I could really use the extra horsepower. I'm pissed Porsche didn't remove the engine from my 2018 and install a 2019 engine for free. Porsche always has a way to make me spend money.
Rating: 9 Votes
2 weeks ago
Finally, another tool in my hypochondria arsenal, I'm sure my doctor can't wait for all the calls asking "is this normal!!??".
Rating: 8 Votes
2 weeks ago

I am pissed that this will not work with my Series 3!! I could really use this app. Apple has a way to make me spend money. I might be stubborn and not buy a Series 4 until refurbs come along.


The reason is simple - just like your car is not able to fly - because it lacks wings.
...Series 3 lacks the sensors needed to measure it...
Rating: 8 Votes

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