Your body's patterns, read honestly. Keld surfaces what's moving your sleep, heart, and energy — and says it only when it's true. By @BioSignalAI
Overland Park, KS
Joined March 2026
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Restorative Tiger
Keld built this whole video itself — voice and all — from your own sleep data.
Core Sleep and REM Sleep rise and fall together in your data, first caught 103 days ago and confirmed ever since. It's not a settled thing, though — the grip loosens and tightens week to week, coming and going rather than holding still. Keld shows that restlessness instead of smoothing it into a flatter story than the data supports.
See your own patterns: keld.us/activity/
Free to start, on the App Store now: apps.apple.com/app/id6759849…
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Keld doesn't call a reading good or bad. It marks when I step outside my usual, and when several touch, that's a run.
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#quantifiedself #signalinthenoise #applewatch #garmin #applehealth
Keld named a pattern in my data: Rock-Leaping Cheetah. On days I climbed more floors, my exercise minutes tended to run higher.
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Keld scores moonlight by window, brightness times height, from moonrise to moonset. Those same windows are what my own patterns get bucketed by.
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Keld named a pattern in my own data: Switchback Stag, my stair-down speed and my stair-up speed, linked. KELD Score 99. Not a surprise, and Keld doesn't pretend it is.
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Keld reads the world around you too. Feels-like temperature is a signal it tracks like any other, and it already feeds two of my patterns.
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#quantifiedself #signalinthenoise #applewatch #garmin #applehealth
Keld found a link between my steps and the floors I climb. In a few parts of my day, it only shows up six days later.
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#quantifiedself #signalinthenoise #applewatch #garmin #applehealth
My whole day on one page in Keld: activity, goals and the night ahead, by the parts of my day, not one forecast for all of it.
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Most apps flatten your data into a daily average. Keld keeps every reading, with the true lows and highs, not just the line through the middle.
#quantifiedself #signalinthenoise #applewatch #garmin #applehealth
Keld 2.2.7 is out. Not ready for a trial? Tap Not Now and Keld works fully for a day with your Health data, then asks again tomorrow.
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#quantifiedself #signalinthenoise #applewatch #garmin #applehealth
17,867 heart rate readings in 30 days. Keld keeps every one, not just a daily average.
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#quantifiedself #signalinthenoise #applewatch #garmin #applehealth
Only 4 people carry this pattern. Keld shows where mine sits, then asks me to rate it: Passing, Useful or Essential?
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Keld lists everything that leaves your phone, and why. None of it is your readings. We never sell your data.
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#quantifiedself #signalinthenoise #applewatch #garmin #applehealth