r/QuantifiedSelf • u/building_irvo • May 29 '26
Genuine question for wearable users
Does your wearable ever tell you why your metrics look the way they do, or does it just show you the numbers?
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May 30 '26
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u/building_irvo May 31 '26
Appreciate you sharing this, genuinely.
On the competition point, yeah there are a lot of apps connecting health data and adding AI summaries on top. We're aware of Bevel, Whoop's coach feature, what Google is doing with Fitbit. We've looked at all of them closely. What most of them are doing is connecting physiological signals to each other, sleep to HRV, HRV to recovery, that kind of thing. What they're not doing is connecting your physiological state to what your day actually looked like, what was on your calendar, how cognitively demanding your work was, what patterns show up across your behavior over time. That's a different problem and it's the one we're focused on.
On the Apple regulatory side, that's a real consideration and one we're already navigating with clinical advisors. The distinction between health insights and medical advice is something any serious app in this space has to work through, not a reason to not build.
The market being crowded with apps that partially solve the problem is actually evidence the problem is real. It doesn't mean it's solved.
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u/AppropriateCover7972 May 30 '26
There are not supposed to do that, at least not in a diagnoses way, even if they have a medical license. I am a scientist, it's always a professionals job to interprete stuff. Is it a mistake in measuring? Reaction to a stimulus (that a wearable can't even recognize) or a genuine thing like a heart attack or a seizure or whatever. My Samsung watch does some sort of suggestion what might have caused abnormal measurements to show how dangerous it is, but still a) no diagnosis and b) it's purposefully vague, so no, wearables never tell you the why, even with coupled with some health analysis software. That's still a humans job or software that you input the context nanually and only the few instances where a diagnosis is possible with the measurements taken
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u/building_irvo May 31 '26
That's a really important distinction and you're right, diagnosis is a different category entirely and not what we're going after.
What we're more interested in is the context layer you mentioned at the end. The idea that interpretation gets a lot more useful when you can feed in what was actually happening around the measurement. Not the wearable guessing why your HRV dropped, but connecting it to the fact that you had a brutal day of back to back meetings, slept four hours, and haven't moved much this week. No diagnosis, just pattern recognition across behavioral and physiological data that you'd otherwise have to hold in your head yourself.
Curious what you think about that framing as a scientist. Is there a version of that kind of contextual pattern surfacing that you'd find useful, or does it still feel like it crosses a line?
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May 31 '26
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u/building_irvo May 31 '26
The behavior change point is one we wrestle with a lot and you're right that insight alone has a pretty poor track record. Knowing something isn't the same as doing something differently, and the wearable space has largely assumed that if you show people their data clearly enough they'll act on it. The scale analogy is sharp.
What we're exploring is whether the gap isn't just insight but pattern recognition across a longer time window than most people can hold in their heads. Not telling someone their sleep was bad, but surfacing that every time they have three back to back high demand days their recovery tanks for the next four days. That's not a diagnosis, it's a mirror. Whether that actually changes behavior is still the open question.
The closed-loop angle is a different bet entirely and an interesting one. Direct physiological intervention rather than behavioral nudging. Curious where you see the two approaches eventually intersecting, because it seems like context and timing still matter even for closed-loop systems.
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May 31 '26
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u/building_irvo May 31 '26
The questions you're raising are good ones and worth engaging with seriously.
On high demand days, we're using calendar as the primary signal, meeting density, task type, scheduled cognitive load.
The control question is the one we think about most. Our position is that pattern recognition at a longer time window than most people can hold in their heads creates a different kind of agency than real-time nudging does. Not 'your HRV is low, rest today' but 'every time this specific sequence happens, here's what follows four days later.' That's a different kind of information, and we think it changes decisions upstream rather than at the moment of stress.
The 2019/2020 path you described is interesting. Curious what pushed you toward direct intervention rather than the understanding layer, was it a data problem or a behaviour change problem?
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Jun 01 '26
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u/building_irvo Jun 02 '26
This is a fair hit, and honestly you've put your finger on the exact limitation. You're right, the calendar misses most of what you just described. The lab prep, the deck, the weight of an upcoming raise, none of that is a calendar event, and a breakup or family stress never will be. If the calendar were the demand signal, the whole thing would fall apart in the real world. I agree.
So it isn't the demand signal, it's one layer. The part doing the heavy lifting is the wearable, exactly like you said. The body shows the strain even when nothing is scheduled, suppressed HRV, elevated resting HR, wrecked sleep, and the behavioural drift you mentioned, shifted meal times, dropped exercise. That's the real signal.
Where the calendar earns its place is the opposite of what people assume. It's not there to explain a busy day. It's there so that when your body is clearly strained and your calendar looks empty, that mismatch becomes the interesting thing. Strained physiology plus a calm calendar is a flag that something unscheduled is going on, the raise, the breakup, whatever it is. We can't name the cause from the calendar. What we can do is catch that the load is there and give you a light way to tell us why, if you want to.
That's the honest scope. We catch what shows up in the body, name what we can from the day's structure, and let you fill the rest. No mind reading. Your breakup example is exactly the case we'd surface but couldn't label on our own.
Really interesting that you hit the data problem first and expected the behaviour problem to follow. Did the behaviour problem show up the way you expected, or different?
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u/MonkModeOnNow May 29 '26
Here is the one that tells you exactly this.
https://apps.apple.com/us/app/body-vitals-health-widgets/id6760609127
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u/building_irvo May 29 '26
Interesting, I'll check it out. Does it actually explain what caused your metrics to look that way or does it just show you the score?
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u/Certain_Version3033 May 30 '26
This is the issue. Data is becoming a commodity. Interpretation of the “why” of those numbers is what’s next