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Most likely less capable heart rate sensor is the culprit.

I’m going to guess it’s related to battery life. It’s still early and there are many variables but my watch has been dropping to 10% life by 6 pm with only two 30 min dog walks and a 60 min weight session.
 
You can get the elevated heartrate when inactive alerts on s0, but the arrythmia monitoring is part of the US only Stanford study later this year. Pending results, slated for a future wOS release I presume.
That's what I was thinking. We found the elev rate in the health app and activated it on our s0's and I found and bookmarked the Stanford site* which says the study is coming.

* http://med.stanford.edu/appleheartstudy.html
 
I haven’t had the alert, but you have to set it up in the iPhone Health App. It’s definitely an option.

Under 'Elevated Heart Rate' Notifications' in the Health app on my iPhone, 'Show All Sources' has no data.
I've got the watch Elevated Heart Rate set to 100 BPM, and the only trigger and notifications come from my Heart Watch app. Not sure if there is a glitch..
 
Ugh Apple, seriously? I’m an owner of the stainless steel 1st gen Apple Watch and I’m not looking for an upgrade yet since it’s in a pretty good condition. Why should my watch not get the watchOS 4 features if my watch’s hardware is practically identical to Apple Watch Series 1 except for the faster processor. Ridiculous!

I would rather have Apple remove other useless features like ToyStory Watch faces and let me use a feature that I was actually looking forward to.

That’s the exact reason why. The processor bumb from Watch 0 to Series 1 was much bigger than Series 1 to 3 right now.
 
The original is pretty weak compared to all the other models. Mine is still perfectly usable but I am definitely looking forward to the speed increase on the Series 3.

Love reading the whining comments. “I paid a bunch for a watch that currently has more functionality than when I first paid for it! Whaaaa.”

Still using my original and just like watchOS 2 and 3, 4 has been a solid improvement. I’m generally more excited about watchOS releases these days than iOS just because as a less mature platform there’s lots of room for change.
 
“Oh no! Old hardware has limitations with new features!”

“Let’s blame Apple!”

Smh....

And the hardware limitation is?

Happy to hear the reason . And we can debate that

Let's jump in and defend ....Smh ;)
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That’s the exact reason why. The processor bumb from Watch 0 to Series 1 was much bigger than Series 1 to 3 right now.

How does CPU affect HR? Let the iPhone do the number for series one, its connected all the time and u will need legacy data for calculations .

Or do you thin all the data is stored on the AW and it's constantly calculating your HR patterns ?
 
And the hardware limitation is?

Happy to hear the reason . And we can debate that

Let's jump in and defend ....Smh ;)
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How does CPU affect HR? Let the iPhone do the number for series one, its connected all the time and u will need legacy data for calculations .

Or do you thin all the data is stored on the AW and it's constantly calculating your HR patterns ?

What?
The Watch still has to control the HR sensor logic and constantly shuffle HR to the iPhone. Considering the 0 has a single core, once you add all these little things up it could result in too high processor load.

The dual core processor is likely what allows for the sustained work load of HR measurements.
 
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What?
The Watch still has to control the HR sensor logic and constantly shuffle HR to the iPhone. Considering the 0 has a single core, once you add all these little things up it could result in too high processor load.

The dual core processor is likely what allows for the sustained work load of HR measurements.

The series 1 is no slouch, let's be honest. It seems to do fine with all the other fitness stuff. I'm not saying not not CPU, though I have doubts
 
“Oh no! Old hardware has limitations with new features!”

“Let’s blame Apple!”

Smh....

Your wrong. Calculating the resting HR dos not tax the CPU ans more than showing that heart rate over the day graph. The original watches were left out be purpose Not by capability. If health would be a big Point for apple they would not have crippled the S0.
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What?
The Watch still has to control the HR sensor logic and constantly shuffle HR to the iPhone. Considering the 0 has a single core, once you add all these little things up it could result in too high processor load.

The dual core processor is likely what allows for the sustained work load of HR measurements.
It does not shuffle constantly but in batches. The bluetooth bamdwidth is a bigger limitating factor for S0, S1 &S2 equally.
 
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Ugh Apple, seriously? I’m an owner of the stainless steel 1st gen Apple Watch and I’m not looking for an upgrade yet since it’s in a pretty good condition. Why should my watch not get the watchOS 4 features if my watch’s hardware is practically identical to Apple Watch Series 1 except for the faster processor. Ridiculous!

I would rather have Apple remove other useless features like ToyStory Watch faces and let me use a feature that I was actually looking forward to.

Yeah I bought what was it $1149 Stainless Black original watch. It is a bummer, but it works ok otherwise.

I don't think it's the end of the world, but first gen apple devices sure do get cut off sooner.
It highlights the fact the Apple Watch is disposable tech and our first gens will gradually lose out on new software features until they eventually become obsolete and don't work with the latest watchOS.

The 1st gen still works fine with watchOS 4 even if has missed out on a few of the new features so it's done a lot better than predicted by the scaremongers who said it would be junk after a couple of years.
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Yes but crazily S1 wasn’t the original watch.
S0 was!!
Officially, there is no such product as a S0 but the nickname has stuck.

https://support.apple.com/kb/SP735?locale=en_US
 
I had only just noticed this prior to reading.

So it begins the slow death of my S0. I knew it was coming. It sucks. The S3 looks good but I’ll probabaly hold out before upgrading.

I was surprised how well WatchOS 4 worked on the S0.
 
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The original watches were left out be purpose Not by capability. If health would be a big Point for apple they would not have crippled the S0.

Agreed! It's just a calculation, nothing more. All the watches have the same sensor. CPU power is irrelevant because other fitness watches with 5% of the AW cpu power calculate resting HR.

I reported to Apple because it sucks, they even crippled the HR compared to WatchOS3.

See my thread: https://forums.macrumors.com/threads/hr-resting-rate-series-0.2070136/#post-25084514
 
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who said it would be junk after a couple of years.

Me!

My 13 year old Breitling is worth more now than 13 years ago.

My Apple Watch which is a couple of years old is now losing features despite working fine on OS4.

I guess I’d get 50 quid (pounds) for it now at best. That makes it kinda junk!
 
Me!

My 13 year old Breitling is worth more now than 13 years ago.

My Apple Watch which is a couple of years old is now losing features despite working fine on OS4.

I guess I’d get 50 quid (pounds) for it now at best. That makes it kinda junk!
It still works though and hasn't lost any functionality yet.

The Apple Watch is disposable tech so can't really be compared with real watches which will never become obsolete if they are kept in good working order.
 
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I have not been able to find any documentation if apple has changed its sampling from every 10 minutes to continuous. Fitbit charge hr measures heart rate every 5 seconds and according to apple the Watch does it every 10 minutes so if you get a bad heart rate inside those 10 minutes then you are out of luck? During a workout the Watch will sample continuously but not during regular times.

For this new feature to work the heart rate sampling should be continuous or else it seems completely meaningless. Does anyone have more information on this if apple changed the 10 minute interval.

And one more thing - am I the only one who thinks that is the ugliest graph ever

Totally agree with this!! I had atrial fibrillation last year and seen it on my Fitbit HR. Fitbit use 5 sec intervals but continuous in workout mode. Actually one of the reasons I sent my Apple Watch S0 back to Apple and got a refund. It wasn't accurate enough, 10 mins is totally unacceptable for HR tracking!! If you had a heart attack (not that I'm saying the Watch would save me) you would easily be dead in 10 mins and your 'heart rate tracking' watch wouldn't even notice till it read no pulse. Completely stupid. It should be continuous, all the time then it can tell very accurately if you are having heart problems. My Fitbit is way better than any Apple Watch at HR. But I'm getting very excited where this is going! I'm seriously looking into getting S3 but I will keep my Fitbit on the other arm till I know the Apple Watch is tracking better.
 
Okay, let's make this even better. The HR recovery is being measured during workouts, and visible in the workout details within the activity app on your iPhone.
 
It still works though and hasn't lost any functionality yet.

The Apple Watch is disposable tech so can't really be compared with real watches which will never become obsolete if they are kept in good working order.
That Breitling does 0 things more than it did new. The S0 Watch does several.

In the end, your watch’s likely demise will be battery related, or that you just want the newer features that (due to processor limitations or then non existing h/w) aren’t present on your old AW.

(That is, if you actually have one. I say this because you don’t really seem representative of the lux Watch owners I know). I and a group of friends, all owners of at least 1 lux Watch, some of us with several, noted not long after buying our S0, that we probably would not buy any more lux watches, and now a couple of years on have, or will, dispose of the majority of our lux watches before they lose value.

So strongly hs the AW won the battle for the wrist that current lux watch owners I know likely won’t buy another lux watch and are getting rid of those they have.
 
Ugh Apple, seriously? I’m an owner of the stainless steel 1st gen Apple Watch and I’m not looking for an upgrade yet since it’s in a pretty good condition. Why should my watch not get the watchOS 4 features if my watch’s hardware is practically identical to Apple Watch Series 1 except for the faster processor. Ridiculous!

I would rather have Apple remove other useless features like ToyStory Watch faces and let me use a feature that I was actually looking forward to.
The definition of entitlement. No, removing a watch face will not magically grant your outdated processor the ability to do stuff the third-generation can do.

Still love my steel series 0.
 
This is part of Apple’s eco-friendly plan to help recycling.

Seriously — anyone who bought a Series 0 thinking it would be fully supported by Apple 2 models later really doesn’t understand Apple. Apple is just being Apple here. I had Garmin watches 2 years ago that did this kind of heart monitoring. Was its processor more powerful that an AW 0? Doubt it.
 
Ugh Apple, seriously? I’m an owner of the stainless steel 1st gen Apple Watch and I’m not looking for an upgrade yet since it’s in a pretty good condition. Why should my watch not get the watchOS 4 features if my watch’s hardware is practically identical to Apple Watch Series 1 except for the faster processor. Ridiculous!

I would rather have Apple remove other useless features like ToyStory Watch faces and let me use a feature that I was actually looking forward to.
...Because it's not practically identical.

Owner of a series 0.
 
This is part of Apple’s eco-friendly plan to help recycling.

Seriously — anyone who bought a Series 0 thinking it would be fully supported by Apple 2 models later really doesn’t understand Apple. Apple is just being Apple here. I had Garmin watches 2 years ago that did this kind of heart monitoring. Was its processor more powerful that an AW 0? Doubt it.
I don’t think that at all. We just have to remember that quality real watches go up in value as they age. AW is worth next to nothing after a couple of years. That will include the Series 3 in a couple of years time.

I can live with that. My issue is that S3 is not leaps and bounds ahead of my S1. It’s the only product (and ATV) that I’m in no rush to upgrade.
 
I mean I understand my original watch is going to lose features eventually. But I'm pretty sure my watch was $250 (got it as a wedding gift.)

Imagine if you lost features from the $17,000 gold one though. Ouch.
 
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