I have a Samsung smartwatch and use both the blood pressure and ECG functions. Both suffer (especially the ECG) from being inferior hardware to a more reliable instrument. No algorithm is going to make up for this. Arm is better than wrist for BP., resting is a must for consistant and comparable results, recovery time after exercise an indicator of fitness. Consult your GP.
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Also depends on what you’ve just done. my watch sometimes says - you’ll be recovered by a couple of hours.
Once it gave a time a week ahead!
New toy 
Yeah, it’s like with smartphone, I can install hundred of apps but I have only SBB, email, maps, camera and web browser
Imagine if your entire bathroom floor was a scale and you got daily notifications and warnings when you started putting on too much weight.
My point is that there is active and passive monitoring, I have bathroom scales but studiously avoid them, similarly with manual BP machines because I feel fine within myself. A passive monitoring device that quietly collects your BP and then presents it allows you to see when things are getting critical. I guess that’s the difference.
Obviously I would love to have a small invisible gadget continuously monitoring thoroughly my body, or even a bulky “furniture” like an armchair I would sit on everyday to make non-invasive but thorough diagnosis, but at this moment it’s still more of a dream than reality
Pretty much useless as long as people are unwilling to listen.
Gruesome pictures on cigarette packs don’t have smokers quit either.
My bathroom scales actually speak your weight. Thing is it keeps telling me to stand one person at a time.
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Is that because your belly is in the way? I mean why else would you put up with everyone around know about your weight?
Just how many people do you normally take into the bathroom with you?
I got up in the morning.
Why not get a Galxy 7 instead?
https://www.digitec.ch/en/s1/product/samsung-galaxy-watch-7-40-mm-wlan-only-smartwatches-46980682
Then you can also see what time it is?
Surely it should have an alarm when things get critical:
My watch tells me (yes, it speaks) when my heart rate has reached it’s maximum but it’s obviously not the maximum because I can take it above that.
Regarding scales - we’ve got a set of those diagnostic scales. A cheap set and I am under no illusions as to it’s accuracy.
Anyway, I put in a few data sets - with constants apart from the age which was different by twenty years in each case.
Despite everything else being equal, my body fat went up by around 2% for each age equivalent.
Those scales are making assumptions based on age rather than actually making an accurate measurement.
For the age I am now, it has greatly over-estimated body fat levels as looking at one of those image tables of body fat percentages, I look nothing like that.
As an aside, the only time I took my weight seriously was when I was doing a lot of paragliding on a high-performance wing as I needed to know how much extra ballast to carry if conditions were a bit interesting.
Only after reading certain threads. 
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Works quite well for me because my blood pressure is a bit on the low side. Shakes it up a bit.
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Same here! 
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the house is a lousy build. The neighbour would make a joke if it went all the way up.
They’ve been beaten by Huawei:
My BP was down in the cellar this afternoon.
98 / 50
And I feel like hammered shit.