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I Googled; It’s almost hidden.

If you open the Activity app on the iPhone, then select the Workouts section from the bottom icons, then tap on a workout, then swipe right to left on the heart rate graph it shows the heart rate recovery graph.

Phew!

Or you could just check it on Siri face after finished your work out for 2 minutes. It will be right there. 🙂
 
If it appears there then I guess I could. I’d have to reinstall the Siri face that I took off so many years ago I forgot it existed first, however.

Would it give me historic data about HRR? I assume not, so it’s no better than checking in the baked in Heart Rate app like I do currently, and the post above about checking it in Activity is still valid for recovery data from past workouts.
 
One of the most interesting and useful pieces of info I've gotten from AutoSleep is seeing how much even a small amount of alcohol affects my deep sleep. I usually get between two and a half and three hours of deep sleep according to my watch, but almost always zero if I've had any alcohol at all. It has actually changed my habits - now I will much more often say no thank you to a glass of wine with dinner if I'm out or invited to a dinner party. I find myself thinking about it differently. I really feel a difference when I haven't had my usual amount of deep sleep.

And I love wine! 😝
 
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One of the most interesting and useful pieces of info I've gotten from AutoSleep is seeing how much even a small amount of alcohol affects my deep sleep. I usually get between two and a half and three hours of deep sleep according to my watch, but almost always zero if I've had any alcohol at all. It has actually changed my habits - now I will much more often say no thank you to a glass of wine with dinner if I'm out or invited to a dinner party. I find myself thinking about it differently. I really feel a difference when I haven't had my usual amount of deep sleep.

And I love wine! 😝

The same for me - this was one of the first things I realized. Being german, I prefer beer.
 
The sleep tracking and blood oxygen detection probably will be only for aw6... Apple always do the same, for old Users nothing, and new hardware and software features exclusive for new models
 
The built in Heart Rate app has 1 and 2 minute recovery on the watch after a workout; scroll to the bottom. I imagine it’s captured in Health also but I only look at it after a workout to check it looks good. You need to stop your workout on the watch as soon as you are done exercising as that’s what triggers the heart rate app to record the heart rate recovery data.
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I Googled; It’s almost hidden.

If you open the Activity app on the iPhone, then select the Workouts section from the bottom icons, then tap on a workout, then swipe right to left on the heart rate graph it shows the heart rate recovery graph.

Phew!

Okay, I was aware of that aspect, I thought you meant a full "recovery time" like the time it takes your body to recover from a hard workout like with Firstbeat metrics. I don't that that "recovery" is available on the Apple watch, except for the aforementioned "Fuule" app. Thanks for the clarification.
 
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I wonder how reliable such indirect "measures" can be- they are derived from a bunch of indirect parameters turned into an algorithm and are probably not better than guesswork.

Agree, I personally have no use for this. I know when I've had a good night's sleep, and when I've not. Adding another ring for sleep would probably make me give up my Apple Watch, as there's nothing worse than feeling "pressure" to sleep when you've not been sleeping well. Hopefully Apple will be smart enough to realise this.

That said, I have a friend who was diagnosed with a sleep disorder with the help of a sleep tracking app (turns out his body clock is out, and so his brain is only ever ready for sleep at 4AM)
 
The sleep tracking and blood oxygen detection probably will be only for aw6... Apple always do the same, for old Users nothing, and new hardware and software features exclusive for new models

I don’t think that will be the case at all. When Apple has released new features only for the new Watch it has been because of the need for new hardware. Give me an example when they didn’t make something - anything - available for previous generation Watches that had the hardware to support it.

Supporting old hardware as long and as fully as possible is EXACTLY how they do things.

Sleep tracking is absolutely possible with the current sensors - even the S0 can capture enough data to get reasonable information on sleep. If blood oxygen needs a new sensor then of course it will be S6 only, but if it doesn’t then the S4 and S5 will have it - possibly earlier series also.
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Okay, I was aware of that aspect, I thought you meant a full "recovery time" like the time it takes your body to recover from a hard workout like with Firstbeat metrics. I don't that that "recovery" is available on the Apple watch, except for the aforementioned "Fuule" app. Thanks for the clarification.

My sport is cycling and I use a Garmin computer as my primary for that. It gives a recovery time, but it doesn’t have any data points that the watch doesn’t have. It also gives an indication of performance condition after a few minutes, and updates it live throughout the ride. Both of those could be added to the Watch in software only.
 
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For example always on display. Aw4 can do it perfectly but is limited by software.
and with the iphone every year have new features of sofware available only for the last model’s...
 
For example always on display. Aw4 can do it perfectly but is limited by software.
and with the iphone every year have new features of sofware available only for the last model’s...

Actually no; it can't.

The S5 screen has a whole second layer that the S4 screen didn't have that helps to allow the refresh rate to be varied and drop as low as 1Hz, and it has an ambient light sensor to manage the screen brightness. Both of those HARDWARE differences are essential to the AOD's function.

Of course the S4 could have its display on all the time, but with the same brightness and refresh rate as it does when it's being used, which would come at the expense of uselessly short battery life. ALL of the S5 screen tech is around providing AOD with usable battery life. It's not hard to keep a screen on all the time with unlimited power available, but the Watch has a small battery.

https://www.macrumors.com/roundup/apple-watch/ isn't the best write-up on the screen's differences, but it's not an off-site link so hopefully I can post it.

Feel free to show me where any credible source has proven - or even realistically proposed - that the S4 can do AOD "perfectly well"
 
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I use AutoSleep, and the hit on the battery is negligible. I wouldn't worry about battery life for sleep tracking, however, the SpO2 tracking is a completely different story.
I have a Garmin Fenix 6 Pro that does have the SpO2 tracking, and when it's enabled, there's a SERIOUS HIT on the battery. I'm talking a battery life per charge of around 10 days normal use without the SpO2 enabled, and when it is enabled, the battery life drops to at best, 5 days. How will Apple get around this? If SpO2 tracking cuts battery life in half, would the watch even be able to go 24 hours without a charge? Pretty much would render either the feature, or the watch useless, I'd say.

Battery hit is definitely negligible as once set up you can even REMOVE the app from the Watch and just have the Phone app, and everything still works.
Ie...collection of sleep data is something that the Watch does natively, it’s the reportage that’s requires third party apps (Currently).
 
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