Did you know: the Apple Watch has a heart monitor as accurate as the best dedicated heart trackers

The Apple Watch seems to be a rather polarizing device: some love it, others - not so much, but at the end of the day, it has picked up some initial momentum. And while we already know about its various features like the option to send your heart beat to other Apple Watch-toting friends, did you know that the Apple Watch actually has a heart monitor tuned to near perfection, on par with the best dedicated heart monitors out there?

Software engineer and SonoPlot founder Brad Larson took the raw data from his Apple Watch heart monitor and stacked it atop data for the same period, but generated by a dedicated heart-rate monitor, the Mio Alpha. The Mio Alpha itself is a wrist-worn wearable, but it has already been tested to feature 99% accuracy in readings when compared with a chest-strap pulse tracker.

The chart above shows the data for the Apple Watch plotted against the Mio Alpha, and one can easily spot just how identical the readings are. Truly impressive.

The Apple Watch uses a pulse oximeter to measure your heart rate, a technology that beams color to your veins to measure your heart rate by the reflected light. Recently, it was found that readings are corrupted by hand tattoos, and Apple itself confirmed this, but for all others - the accuracy is truly impressive.

source: iClarified



1. Jorgemerino97

Posts: 70; Member since: Apr 05, 2014

what about the S5 and S6?

4. Ordinary

Posts: 2454; Member since: Apr 23, 2015

Even on my S3 and S4 I get highly accurate readings on instant heart rate app lol

39. nanozander

Posts: 97; Member since: Oct 19, 2011

Off Course it's accurate. Take the heart rate monitor on the samsung note 4 for example. It requires you to stand still and not move for accurate results. The trick is to get an accurate reading while you're jogging. Movement of the watch on your wrist + your sweat can screw up the sensor's accuracy. No doubt the iWatch has a more advanced sensor. But i'd like to see such tests done on people doing sports rather than just seating on a chair.

10. AnTuTu

Posts: 1625; Member since: Oct 14, 2012

Did you know: the Apple Watch has a heart monitor which doesn't work if you have tattoos :p

22. bucky

Posts: 3797; Member since: Sep 30, 2009

did you know the S6 bends easier than the iphone 6+?

24. Sauce5 unregistered

He's just mad hahahahaha

28. MrElectrifyer

Posts: 3960; Member since: Oct 21, 2014

Did you know that's BS (bit.ly/1Kr47ub)?

30. maherk

Posts: 7065; Member since: Feb 10, 2012

Let them re-do the test again and set the pressure point at the volume keys, then tell le what happens. Whether you wanna admit it or not, the iPhone 6+ had a weakness in its chassis near the volume buttons, and even Apple has ADMITTED the existence of this issue by clarifying that it was fixed later on.

32. arch_angel

Posts: 1651; Member since: Feb 20, 2015

actually its the s6 edge that has a bending problem not the s6. but i haven't heard about it bending in your pocket like the iphone 6+

35. Sauce5 unregistered

It hasn't been heard of because it isn't as socially popular a device as Apples products are, obviously. It's sad hearing from my friend at Best Buy about all the calls he gets asking about returns, with no other response but to say they have to go through Samsung. Ouch.

37. arch_angel

Posts: 1651; Member since: Feb 20, 2015

lol Samsung products not as popular as apple products that's not true and plenty of people return apple products bruh.

38. medicci37

Posts: 1361; Member since: Nov 19, 2011

Actually as the owner of a Samsung Galaxy 6 I don't know that because it's pure BS

43. Iodine

Posts: 1515; Member since: Jun 19, 2014

Don't go on an iHater with some logic... Only the iPhone can bend like tinfoil, even hulk can't bend the other phones.

57. marorun

Posts: 5029; Member since: Mar 30, 2015

Samsung S6 edge bend easier btw... And i hate both Apple and Samsung :P

45. Tajiseo

Posts: 48; Member since: Mar 03, 2015

No they dont

29. InspectorGadget80 unregistered

How can it be accurate when it can't even sense over tattoo's

42. Iodine

Posts: 1515; Member since: Jun 19, 2014

Did you know that no opticall hearth rate monitor works properly with tatoos ? Oh, but that would mean that "tatoogate" is just another iHaterbubble trying to acusse Apple watch for bassically having a hearthrate monitor.

54. AmirBudi

Posts: 89; Member since: Mar 21, 2014

My Galaxy S5 is not accurate. Sometimes it returns about 60 and sometimes returns 200 !

63. babyk

Posts: 379; Member since: Nov 03, 2011

They are not concerned about s5 and s6 becasue they are being paid by apple

2. ama3654

Posts: 295; Member since: Nov 27, 2012

And it can't see through simple tattoos...smh! sorry people with sleeve tats.

5. Martin_Cooper

Posts: 1774; Member since: Jul 30, 2013

sorry less than 1% of the population, we were thinking to invest billions into making a new technology that works great for you too but then we thought 0.1% wasn't important..

20. 87186

Posts: 312; Member since: Aug 01, 2014

sure, if that makes you feel better for their lack of R&D. I also know a lot of apple employees with tatts. so that less than 1% of the population, hits a little closer to home.

21. An.Awesome.Guy

Posts: 636; Member since: Jan 12, 2015

I am wondering about how an injury or a infection would affect the reading. If it can't really read, then I should people must take caution using it.

3. mistercarter

Posts: 360; Member since: Sep 01, 2011

Apple never plays when it comes to quality and this is just another example in a long list

8. willard12 unregistered

Are maps, tlc memory, and cellular antennas on that list?

11. UglyFrank

Posts: 2200; Member since: Jan 23, 2014

+1 for Willard :) -1 for Mr Carter.

15. Mxyzptlk unregistered

Don't be ignorant.

34. AnTuTu

Posts: 1625; Member since: Oct 14, 2012

You forgot #Bendgate and #Tattosgate on that list bro :p


Posts: 226; Member since: May 10, 2015

I've always had faith in Apple, the only one that differentiates us from uncivilized Androiders.

46. ibend

Posts: 6747; Member since: Sep 30, 2014

yeah.. quality... china's actually make some great quality device

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