Your wearable sees the change.
Rhythmly reads it in context.
A calm second read against your own baseline.
Private · Non-clinical · No new hardware
Your wearable already measures the week.
It still leaves you to guess what changed.
Most wearables are good at capture. They are weaker at interpretation. A number moves, a score drops, a night looks off — and you’re left to decide whether it was travel, bad sleep, weak signal, or real drift.
Rhythmly reads that change against your baseline, then shows what it used before you trust the read.
Between-visit health intelligence.
The reading layer that sits between your wearable and your doctor. It reads continuous signal against your own baseline, and shows its work before you trust the read.
Rhythmly is the first.
Four jobs. Done quietly.
Rhythmly AI learns your baseline, separates drift from noise, reads signals together, and shows its work before you trust the read.
Learns your baseline.
Not today’s number. What’s normal for you, across weeks.
Separates drift from noise.
Travel, poor sleep, missed wear, a hard workout, sync gaps — recognized, not flattened into a score.
Reads signals together.
Sleep timing, activity stability, overnight variability, recovery bounce-back — fused into one read.
Knows when to stay quiet.
Weak, contradictory, or incomplete signal should not become a confident read.
The Second Read.
Open Rhythmly. One screen. Your state, your context, your memory — and a Witness that shows the work.
Mild Drift
Confidence: medium
Sleep timing shifted later 4 of 7 nights. HRV ↓12% vs your 30-day baseline. Resting HR within range.
Yes — 3 prior weeks looked like this. 2 returned to stable within 6 days. 1 deepened into a recovery week.
Earlier bedtime by 40+ minutes preceded recovery in 2 of 3 prior cases. Caffeine timing was not the dominant factor for you.
Optional: pull bedtime earlier this week. Or hold and let the rhythm settle. Both are reasonable.
● Computed on-device · 0 bytes left your phone · Used: sleep, HRV, resting HR · Ignored: messages, location, calendar
One screen. Open it when a number from your wearable doesn’t sit right. The rest of the time, it stays quiet.
Care lives between
visits.
Rhythmly uses AI to compare your wearable signal against your own baseline, decide what changed, and show its work before you trust the read.
EHRs capture visits. Wearables capture proxies. Nobody links recommendation → action → physiology → experience.
Rhythmly connects what happens between them — linking recommendation to action to physiology to lived experience.
Stable
Three surfaces.
One between-visit record.
Rhythm Whisper™
The foundational signal. A weekly read of your rhythms, translated into one clear signal for the week ahead.
The signal
Rhythm Witness™
A verifiable receipt attached to every Whisper.
Proof layer
Voice Check-In
A short voice reflection that anchors the daily signal to your lived experience.
The check-in
01 · Rhythm Whisper™
The signal.
One structured daily signal from the wearable you already use. Stability, drift, recovery — with a personal baseline from day one. Confidence-scored. Evidence attached before delivery.
Read against your own rhythm, not a generic score.
Mildly drifting
Recovering
DAILY READ · MAR 30
MILD DRIFT
0.5 drifting
1.0 stable
drifting
recovering
Informational only · Not medical advice
02 · Rhythm Witness™ — The Proof Strip
The proof strip.
A verifiable receipt attached to every signal — before you ever see the output. Compact by default. Open it the moment a read feels surprising, low-confidence, or worth sharing.
Rhythm Witness™
RW-260330-068-004
Sleep timing · HR trend · Activity load · Recovery proxies
Messages · Photos · Contacts · Location
On-device · de-identified summary only
Medium — signal flagged, not suppressed
Mar 30, 2026 · 06:14 local
Generated every day. Surfaced lightly by default. Opened in full when the read becomes consequential — high drift, low confidence, or worth sharing with a coach or clinician. Evidence is the reason the daily content can be trusted.
03 · Voice Check-In
The in-app check-in.
Bedtime shifted ~38 min earlier across the past four nights, and HRV trended down on the matching mornings. Recovery proxies stayed in your normal band, so this is being read as a timing pattern, not a strain pattern. Want to flag anything from this week?
Compensatory early bedtimes after late nights commonly show up as a small HRV dip for two to three mornings while sleep timing re-aligns — that matches what we’re seeing here. Nothing in the signal is reading as out-of-band for you. I’ll keep this in your between-visit record so it’s there if you bring it up at your next appointment.
Your check-in stays connected to the same between-visit record as your rhythm — without storing sensitive content. Day by day, Rhythmly builds the timeline appointments rarely capture.
Built for weeks
that actually matter.
Where recovery drift shows up before pace slows. One weekly read tells you whether your body absorbed the load — or is still catching up.
When a between-session read matters more than another dashboard. Share your Whisper with your coach — same signal, no extra integration.
For people who already wear a wrist device and want the data to mean something. Not more charts — one trusted signal, once a week.
Wearables became continuous.
AI became longitudinal.
Healthcare is still episodic.
Wearables are already data-rich. The problem is still interpretation.
Rhythmly stays quiet.
Not every change deserves a story. When the data isn’t there, the read shouldn’t be either.
Not enough signal this week.
Two nights of sleep data were missing. Travel likely distorted your baseline.
Confidence: low
Ignored: incomplete recovery estimate
Healthcare has always been data-rich but insight-poor.
Wearables made the data richer.
They didn’t solve the insight problem.
Wearables generate data. Nothing generates confidence.
The data your watch captures every night is real. The question is whether you can trust what it’s telling you. That’s the gap Rhythmly was built to close.
Intelligence you can’t inspect
is just a black box with a pulse.
Most wearables give you more data. Rhythmly gives you one trusted weekly read: what shifted this week, how confident to be, and what changed in context. The hard problem is not generating another score. It’s making that score inspectable enough to act on.
The Witness strip tells you exactly which signals shaped your Whisper, what was excluded, and where compute ran. No black box.
The Whisper Index tracks drift vs your personal baseline over time — not against a population average. Earlier signal. More honest confidence.
The Voice Check-In closes the loop with a 60-second reflection — a listener-only moment that connects the signal to your lived experience, not a generic push notification.
Most wearables stop at descriptive. Rhythmly builds all three layers.
Not more charts. One trusted signal, once a week.
Models are swappable. Trust is not.
We don’t just say private.
We show you what we saw.
The Rhythm Witness™ strip is not a policy page. It is a live, verifiable record — attached to every output before it reaches you.
Zero-content by default.
“The signal is only as trustworthy as the reasoning behind it. Interpretability isn’t a feature. It’s the floor.”
- We do not scan messages, photos, contacts, or location
- Opt-in signals only; you choose what connects
- On-device compute by default
- Cloud processes de-identified summaries only
- Pause or stop anytime, one tap
- Every insight ships with a Witness strip
- Non-clinical by architecture, not by loophole
- Designed with DPDP, EU AI Act, and FTC expectations in mind
Rhythm Witness™ — Full Strip
Verified
Mild Drift · Mar 30
Sleep timing · HR trend · Activity · Recovery proxies
Messages · Photos · Contacts · Location history
On-device · de-identified summary only
Medium — signal flagged, not suppressed
RW-260330-068-004
Mar 30, 2026 · 06:14 local
Health doesn’t only happen in appointments.
It happens in the long quiet stretches between them.
We call this between-visit health intelligence. Rhythmly is the first.
The signal was
never missing.
The read was.
We’re opening a limited first cohort for people already using a wrist wearable and looking for a trusted read of the numbers it gives them.
Invitations open soon.
The first cohort is still forming. We’ll open requests when the window is ready.