Circadian health, reimagined

Your body hasa rhythm.Trana reads it.

Trana turns passive Apple Watch data into personalized insights about your 24-hour biological clock — detecting drift before it impacts your health.

Learn the science

Built on peer-reviewed research from npj Digital Medicine, The Lancet, and JMIR Medical Informatics

The app

See what Trana
shows you

A daily score, personalized insights, and drift detection — on your wrist and in your pocket.

9:41trana

82

trana score

Rhythm aligned

AMP

0.84

STAB

0.71

FRAG

0.32

Insight

Peak activity at 11:20 AM — ideal for focused work.

Today

9:41trana

7-Day History

M
T
W
T
F
S
S

Avg score

77

Streak

5 days

Best day

88

Drift events

1

History

9:41trana

Today's Schedule

10:30 AM

Focus window opens

🧠

2:00 PM

Caffeine cutoff

☕

6:30 PM

Exercise sweet spot

🏃

9:45 PM

Wind-down begins

🌙

Drift Alert

Peak shifted 28 min later — 3rd consecutive day.

Insights

82

Aligned

trana

Score

⚠️

Drifting

Peak shifted +28min for 3 days

Drift Alert

82

trana

Graphic Circular

Complication

Why now

The invisible problem

Your body runs on a 24-hour clock. It dictates when you're sharpest, when your metabolism peaks, when your immune system is most active. Most people have never seen this clock. They just feel the effects when it breaks — the unexplained fatigue, the 3 PM crash that coffee can't fix, the sleep that never feels like enough.

Circadian disruption isn't dramatic. It's gradual. A few late nights. A weekend of irregular sleep. A new work schedule. Your rhythm shifts 20 minutes, then 40. By the time you notice something's wrong, the drift has been compounding for weeks.

The Shift Worker

Rotating schedules make it impossible to settle into a rhythm. Research on 800 physicians found a bidirectional link between shift-driven disruption and depression scores.

npj Digital Medicine, 2024

The New Parent

Fragmented nights don't just mean less sleep — they shatter your rhythm's amplitude. When your body can't tell day from night, metabolic and mood effects cascade.

Makarem et al., JAHA, 2024

The Remote Worker

Without a commute or office anchor, your wake time drifts later by minutes each day. After a month, you're living in a different timezone from your biology.

Lim et al., npj Digital Medicine, 2024

The Frequent Traveler

Jet lag isn't just tiredness. 13 million hours of light sensor data linked irregular circadian patterns directly to type 2 diabetes incidence.

Windred et al., Lancet, 2024

8–12%

higher mortality risk per +1 year of circadian aging

From a study of 80,000 participants using 7-day wearable circadian data to compute biological “CosinorAge”

Shim, Fleisch & Barata · npj Digital Medicine · 2024

Real patterns, real changes

MA

Maya, 34

ER Nurse

“I knew night shifts were hard, but I didn't realize my rhythm was 47 minutes off baseline. Trana showed me my Wednesday-to-Thursday transition was the worst. I started protecting Thursday mornings and the difference was immediate.”

Trana showed: Acrophase shifted 47 min on rotation days

JA

James, 41

Remote Engineer

“I thought I was a night owl. Trana showed me I was actually drifting later every week — my acrophase had shifted by over an hour in a month. Just setting a consistent wake alarm brought my score from 58 to 79.”

Trana showed: Score improved from 58 to 79 in 3 weeks

PR

Priya, 29

New Mom

“After our daughter was born, I assumed exhaustion was just parenthood. Trana showed my rhythm amplitude had collapsed to 0.3. Once I started protecting one consistent 4-hour sleep block, my amplitude recovered to 0.7 in two weeks.”

Trana showed: Amplitude recovered from 0.3 to 0.7

Your Apple Watch is already collecting the signals.
Trana turns them into understanding.

The research

Built on science,
not wellness folklore

3 days

early drift detection

Circadian drift detected before mood episodes

8–12%

mortality risk per +1yr

CosinorAge biological clock study, 80K participants

0.80+

AUC prediction accuracy

Wearable data predicts next-day mood episodes

100%

on-device processing

No health data ever leaves your phone

How it works

Your invisible clock,
made visible

Watch collects. Trana analyzes. You understand.

Circadian Fingerprint

Every person has a unique 24-hour rhythm shape. Trana computes yours from heart rate, steps, and sleep — then watches for changes.

Drift Detection

When your rhythm shifts 20+ minutes for 3 consecutive days, Trana alerts you. Research links sustained drift to metabolic stress and mood disorders.

Trana Score

One number, 0–100, that tells you how aligned your rhythm is today. Teal means aligned. Amber means drifting. Red means pay attention.

Chronotherapy Nudges

Time-tagged suggestions based on your personal acrophase — optimal focus windows, caffeine cutoffs, and wind-down times.

Pattern Intelligence

After 14 days, Trana surfaces patterns you can't see yourself: weekend disruption, sleep-length correlation, seasonal shifts.

Private by Design

All computation happens on your device. No health data ever leaves your phone. No cloud. No third parties. No exceptions.

Peer-reviewed research

Every algorithm backed
by published science

JMIR Medical Informatics2025

“Circadian Complexity Entropy and relative amplitude of heart rate predict metabolic syndrome — outperforming traditional sleep markers.”

Kim et al.

Used in Trana for: Relative Amplitude metric, metabolic risk score

npj Digital Medicine2024

“CosinorAge — biological age estimated from 7-day wearable circadian data in 80,000 people. +1yr CosinorAge = 8–12% higher mortality risk.”

Shim, Fleisch & Barata

Used in Trana for: Biological rhythm age signal, cosinor curve fitting

npj Digital Medicine2024

“Wearable sleep-wake features predict next-day mood episodes with AUC 0.80–0.98. Phase delays predict depression; advances predict mania.”

Lim et al.

Used in Trana for: Drift alerts, acrophase shift detection

J Am Heart Assoc2024

“Rest-activity rhythm disruption associated with cardiovascular disease, hypertension, and obesity in a nationally representative US sample.”

Makarem et al.

Used in Trana for: IS/IV metrics, cardiovascular risk framing

Lancet Regional Health2024

“13 million hours of light sensor data: irregular circadian patterns associated with type 2 diabetes incidence.”

Windred et al.

Used in Trana for: Metabolic risk messaging

npj Digital Medicine2024

“50,000+ days of wearable data from 800 physicians: bidirectional link between circadian disruption and depression scores during shift work.”

Real-world MD data

Used in Trana for: Drift alert severity framing

FAQ

Common questions

Know your rhythm.
Own your health.

Download Trana and start understanding the clock that runs everything — your energy, your mood, your metabolism.

Requires Apple Watch Series 4+ · iPhone iOS 17+ · Free to use

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