BioSignal AI @BioSignalAI
Situational intelligence for where mistakes are expensive — surfacing what's hidden in your data, and saying it only when it's true. We make @KELDapp. BioSignalAI.com Overland Park KS Joined May 2026-
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Join the Beta of an App the iterates at light speed!
Keld is live on the App Store — but we're also testing what's next, and I want more real phones, real data, real skepticism on it before it ships. We've got about 130 TestFlight seats open right now. If you're curious how the app behaves before everyone else sees it — bugs,
this is Yuge!
Keld just got a complete makeover. 🎉 A brand-new website is live now — explore the Field Guide, the Metric Index, and a whole new look at keld.us. The reimagined app — rebuilt native for Apple, animated elementals and all — is coming soon. Get an early look in
We iterate at lightspeed...
v1.9.1 is live. Your patterns now read in plain English — "Resting Heart Rate at Chapel Hill," not grid coordinates. A new Today summary lays out your day, no conclusions drawn. And the startup freeze is fixed. Honest by design — Keld never says one thing "caused" another.
Incredible Update!
v1.8.2 is live. The biggest Keld since launch. Four pattern categories on a rebuilt Pulse home. Two new Element classes — patterns at your places, and patterns that braid biology, weather, and place together. A new Forecasts tab with the Sun, Moon, and five naked-eye planets in
What a personal-biometrics model that stays honest about its own confidence actually looks like, end to end. New video from @KELDapp walks every panel of the Pulse page — for the people who already know the difference between a correlation and a confirmed pattern.
First solo episode is up. A 20-minute walkthrough of the Pulse page in Keld, panel by panel, for the quantified-self crowd. The honesty contract, the lag clock, the rhythm modes, the BIO/ENV/HYBRID trichotomy — why each piece is on the screen, and why some boxes stay at zero.
Update in the App Store ↓ apps.apple.com/app/id67598492…
Keld v1.7.0 is live. Your saga, told — as a four-beat shareable video. Thirteen animal sigils. A rebuilt Pulse. A new Library. The honest-math Truth Gate woven through every reading. Update in the App Store.
@KELDapp reads what's actually moving in your body's data — sleep, heart, energy, environment — and shows you your patterns, never an average of strangers. Adding a small group of careful TestFlight testers to shape what comes next. Reply or DM.
The Causes You Can’t Measure open.substack.com/pub/biosignala…
Major improvements are coming soon to Keld
Here's one caption that works as-is on Facebook, Instagram, and X (paste with the cropped Keld card image): I never told Keld to look for this — it found it. My walking speed and my step length aren't two numbers, they're one pattern. Faster pace, longer stride. Slow morning,
The full essay — on latent variables, an unfashionable model of memory, and the instrument you infer into existence: biosignalai.substack.com/p/the-causes-y…
Which dissolves the sharpest objection — "unfalsifiable." It isn't. Every rung is an experiment: a question, an instrument added, an instrument built. Discovery widens. The standard of proof does not move. The objection becomes the research program.
A watch is a tireless clerk. It records heart rate, steps, sleep, temperature — faithfully, forever. None of it is the thing you actually want to know: are you recovering, or quietly digging a hole? The cause has no sensor. It was never pointed at.
KELD @KELDapp
14 Followers 15 Following 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
Tangent 3-6-9 @BWG369
3K Followers 919 Following Creation is a marvel. Engineer simplicity with never ending curiosity. Building @KELDapp & @BioSignalAI
Tangent 3-6-9 @BWG369
3K Followers 919 Following Creation is a marvel. Engineer simplicity with never ending curiosity. Building @KELDapp & @BioSignalAI
KELD @KELDapp
14 Followers 15 Following 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
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