Help Center / Device Integrations

Device data on Centralive

Centralive passively collects research-grade data from wearables and connected devices across three providers. Available metrics depend on the participant's device model and the study's configuration — and every export is de-identified.

ProvidersGarmin · Oura · Withings

ConnectionSecure OAuth 2.0

ExportsDe-identified CSV

Supported devices

Pick a provider to browse its device types as tabs, or open Compare devices to line two or three up side by side.

At a glance

Provider	Device families	Headline data
Garmin	Watches · Index BPM · Index S1/S2 scales	Heart rate, HRV, activity, sleep, stress, SpO₂, body composition, blood pressure
Oura	Ring Gen 2 / 3 / 4	Sleep, readiness, HRV, heart rate, SpO₂, activity, temperature, cycle insights
Withings	BPM · scales · ScanWatch · Sleep Analyzer · Thermo · BeamO	Blood pressure, ECG/AFib, body composition, sleep, SpO₂, temperature, vitals

Compare devices side by side

Line up watches, rings, scales or monitors of the same type and see exactly which metrics each one captures.

How exports work

Exported data is grouped by device class, then by category, then by participant. Every data file shares the same leading columns — participant ID, local timestamp, timezone and UTC timestamp — followed by the metric values and the device model. Free-text and account identifiers are dropped at ingestion, so exports stay de-identified.

Help Center / Device Integrations / Garmin

Garmin devices & data

What Centralive collects from Garmin watches, the Index BPM monitor and Index smart scales. Pick a device type below.

APIGarmin Health

SyncAutomatic

Retention~7 days on Garmin

About data gaps. Garmin keeps recent data on their side for about 7 days, so Centralive syncs continuously. If a participant doesn't sync for a while, a gap can appear — they're reminded to open the Garmin app and sync.

Garmin watches

Forerunner · Venu · Fenix …

All watches every modelAdvanced FR 255+, Venu 3+, Fenix 7+Premium premium multisport

Data source

Heart rate

Metric	Unit	Description	Availability
Heart rate	bpm	Daily average, minimum and maximum.	All watches
Resting heart rate	bpm	Lowest sustained heart rate — the most clinically relevant daily HR value.	All watches
Heart rate (continuous)	bpm	High-resolution samples every 15–60 s. Empty when off-wrist.	All watches
HRV (RMSSD)	ms	Overnight variability — nightly average plus best 5-minute window.	Advanced

garmin_watch / heart_rate / resting_heart_rate.csvdaily

participant_id,timestamp_local,timezone,timestamp_utc,value_bpm,quality_flag,device_model
P012,2026-03-17 00:00:00,America/New_York,2026-03-17T04:00:00Z,54,ok,Forerunner 265
P012,2026-03-18 00:00:00,America/New_York,2026-03-18T04:00:00Z,52,ok,Forerunner 265
P012,2026-03-19 00:00:00,America/New_York,2026-03-19T04:00:00Z,,missing,Forerunner 265

Activity

Metric	Unit	Description	Availability
Steps	count	Daily steps, also in 15-minute windows.	All watches
Distance	m	Distance travelled.	All watches
Calories	kcal	Active and resting (BMR) calories, separately.	All watches
Floors climbed	count	Empty on watches without an altimeter.	All watches
Intensity & MET	0–3 · MET	Per-15-minute activity intensity and metabolic equivalent.	All watches
Sweat loss	mL	Estimated fluid loss during activity.	Select GPS

Sleep

Metric	Unit	Description	Availability
Sleep duration	s	Total, deep, light and awake durations, plus naps.	All watches
REM sleep	s	Time in REM sleep.	Advanced
Sleep stages	stages	Full hypnogram with each bout's start and end.	All watches
Sleep score	0–100	Overall sleep-quality score.	Advanced
Overnight SpO₂	%	Average and lowest overnight blood-oxygen.	All watches
Sleep respiration	brpm	Average breathing rate during sleep.	Advanced

garmin_watch / sleep / sleep_stages_2026-03-17.csvstages

participant_id,timestamp_local,timezone,timestamp_utc,stage,duration_seconds,quality_flag,device_model
P012,2026-03-17 23:14:00,America/New_York,2026-03-18T03:14:00Z,light,1800,ok,Forerunner 265
P012,2026-03-17 23:44:00,America/New_York,2026-03-18T03:44:00Z,deep,2400,ok,Forerunner 265
P012,2026-03-18 00:24:00,America/New_York,2026-03-18T04:24:00Z,rem,1500,ok,Forerunner 265

Stress & Body Battery

Metric	Unit	Description	Availability
Stress score	0–100	Average and maximum daily stress, plus a 3-minute series.	All watches
Stress durations	s	Time at rest, low, medium and high stress.	All watches
Body Battery	0–100	Energy-reserve measure — high, low, most-recent, plus a series.	All watches

Respiratory

Metric	Unit	Description	Availability
Respiration rate	brpm	Average, lowest and highest, with a full-day series.	Advanced
SpO₂ (blood oxygen)	%	All-day pulse-ox where enabled, plus on-demand spot readings.	All watches

Temperature

Metric	Unit	Description	Availability
Skin temperature	Δ°C	Nightly deviation from baseline (not absolute).	Premium

Fitness & metabolic

Metric	Unit	Description	Availability
VO₂ max	mL/kg/min	Updated after GPS + heart-rate runs.	Advanced
Fitness age	years	Garmin's estimated fitness age.	Advanced
Lactate threshold	bpm · m/s	Heart rate and pace at lactate threshold.	Premium
Health Snapshot	session	2-minute on-demand session: HR, respiration, stress and HRV together.	Premium

Raw sensor logging

SDK studies · watches only

For watch-based studies configured with Garmin's on-device SDK logging, Centralive can collect additional high-frequency raw signals beyond the summaries above. These are enabled per study — not by default — and apply to Garmin watches only.

Signal	Rate	Description
HR, SpO₂, stress, respiration	1–3600 s	Configurable high-frequency samples.
Skin temperature	1–3600 s	Calibrated samples.
Beat-to-beat intervals (BBI)	per beat	Every valid heartbeat interval — basis for fine-grained HRV.
Actigraphy & zero-crossings	30 s	Movement counts from the accelerometer.
Raw accelerometer	~25 Hz	Three-axis raw acceleration.
Raw gyroscope	~32 Hz	Three-axis angular velocity.
Wrist on/off status	on change	Whether the watch is worn — helps interpret gaps.

High data volume. Raw accelerometer and gyroscope need more frequent syncing and battery accommodations. Enabled per study, not by default.

Garmin Index BPM

blood-pressure monitor

Blood pressure

Metric	Unit	Description	Availability
Systolic	mmHg	Systolic pressure. FDA-cleared to ±3 mmHg.	Index BPM
Diastolic	mmHg	Diastolic pressure.	Index BPM
Pulse	bpm	Heart rate during the reading.	Index BPM
Source	enum	Device or manual entry.	Index BPM

garmin_bpm / blood_pressure / readings.csvgrouped

participant_id,timestamp_local,timezone,timestamp_utc,systolic_mmHg,diastolic_mmHg,pulse_bpm,source,quality_flag,device_model
P012,2026-03-17 08:14:00,America/New_York,2026-03-17T12:14:00Z,128,82,72,DEVICE,ok,Index BPM

Garmin Index S1 / S2

smart scales

Body composition

Metric	Unit	Description	Availability
Weight	kg	Body weight.	S1 & S2
BMI	kg/m²	Body mass index.	S1 & S2
Body fat	%	Via bioelectrical impedance.	S1 & S2
Body water	%	Total body-water percentage.	S2 only
Muscle mass	kg	Estimated muscle mass.	S2 only
Bone mass	kg	Estimated bone mass.	S2 only

On an Index S1, the S2-only columns are present in the export but left empty.

Help Center / Device Integrations / Oura

Oura Ring data

What Centralive collects from the Oura Ring. Availability depends on ring generation — pick a category below.

APIOura API V2

GenerationsGen 2 · 3 · 4

StrengthSleep & recovery

Ring generations. Gen 4 matches Gen 3 with improved accuracy. Gen 2 is limited to overnight metrics and does not provide daytime heart rate, SpO₂, breathing-disturbance index, daytime stress, VO₂ max, cardiovascular age, resilience or cycle insights.

Sleep

per night

Metric	Unit	Description	Availability
Sleep durations	s	Total sleep, time in bed, deep / REM / light / awake.	Gen 2+
Sleep efficiency	%	Time in bed actually spent asleep.	Gen 2+
Sleep latency	s	Time to fall asleep.	Gen 2+
Lowest heart rate	bpm	Lowest overnight HR (resting HR).	Gen 2+
Average sleep HRV	ms	Average overnight variability, plus a 5-minute series.	Gen 2+
Average breathing rate	brpm	Average breaths per minute during sleep.	Gen 2+
Sleep stages (hypnogram)	stages	5-minute stages plus 30-second movement.	Gen 2+
Sleep score	0–100	Daily score with contributing factors.	Gen 2+
Recommended bedtime	time	Suggested optimal bedtime window.	Gen 2+

oura_ring / sleep / sleep_stages_2026-03-17.csvhypnogram

participant_id,timestamp_local,timezone,timestamp_utc,stage,duration_seconds,quality_flag,device_model
P031,2026-03-17 23:02:00,America/Los_Angeles,2026-03-18T06:02:00Z,light,1500,ok,Oura Ring Gen3
P031,2026-03-17 23:27:00,America/Los_Angeles,2026-03-18T06:27:00Z,deep,2700,ok,Oura Ring Gen3

Activity & workouts

Metric	Unit	Description	Availability
Activity score	0–100	Daily activity score.	Gen 2+
Steps	count	Daily step count.	Gen 2+
Calories	kcal	Active and total calories.	Gen 2+
Walking-equivalent distance	m	Distance equivalent of the day's activity.	Gen 2+
Activity times	s	High / medium / low activity and sedentary time.	Gen 2+
MET series	MET	Per-minute MET plus 5-minute activity classification.	Gen 2+
Workout	session	Type, calories, distance, duration, intensity and HR.	Gen 2+
Mindfulness session	session	Meditation / breathing with HR and HRV series.	Gen 3+
Non-wear time	s	Days over ~4 h non-wear may be excluded.	Gen 2+

Readiness & recovery

Metric	Unit	Description	Availability
Readiness score	0–100	Daily readiness with contributors (HRV balance, resting HR, recovery index…).	Gen 2+
Daily stress	s · enum	High-stress and recovery durations, plus a day summary.	Gen 3+
Resilience	enum	Longer-term resilience (limited → exceptional) with contributors.	Poll · Gen 3+
Temperature deviation	Δ°C	Nightly deviation from baseline, plus a trend.	Gen 2+

Heart & respiratory

Metric	Unit	Description	Availability
Heart rate (continuous)	bpm	Continuous daytime HR (~5-min), tagged awake / sleep / rest / workout.	Gen 3+
SpO₂ (blood oxygen)	%	Average overnight blood-oxygen saturation.	Gen 3+
Breathing disturbance index	0–100	Overnight breathing-disturbance measure. Not a clinical apnea index.	Gen 3+

oura_ring / heart_rate / heart_rate_series_2026-03-17.csvseries

participant_id,timestamp_local,timezone,timestamp_utc,value_bpm,source,quality_flag,device_model
P031,2026-03-17 14:05:00,America/Los_Angeles,2026-03-17T21:05:00Z,74,awake,ok,Oura Ring Gen3
P031,2026-03-17 14:10:00,America/Los_Angeles,2026-03-17T21:10:00Z,98,workout,ok,Oura Ring Gen3

Fitness & cycle

Metric	Unit	Description	Availability
VO₂ max	mL/kg/min	Estimated cardiorespiratory fitness.	Poll · Gen 3+
Cardiovascular age	years	Estimated vascular age.	Poll · Gen 3+
Cycle phase	enum	Menstrual / follicular / ovulation / luteal. Informational, not contraceptive.	Gen 3+

Tags & metadata

Metric	Unit	Description	Availability
Ring configuration	object	Ring model, firmware and generation.	Gen 2+
Participant tags	enum	Allow-listed tag codes only — free-text notes are never stored.	Gen 2+
Rest mode	period	Illness / recovery rest-mode periods.	Gen 2+

Privacy. The account email and any free-text tag notes are dropped at ingestion and never stored. Exports are de-identified.

Help Center / Device Integrations / Withings

Withings devices & data

Withings has the broadest device range Centralive supports. Pick a device family below — metrics vary widely by device.

APIWithings Health Data

Devices8 families

HighlightsECG · AFib · sleep

EU only EU regionUS only US regionModel-gated specific device / pack

BPM Connect / Pro / Pro2 / Vision

Blood pressure

Metric	Unit	Description	Availability
Systolic	mmHg	Systolic blood pressure.	All BPM
Diastolic	mmHg	Diastolic blood pressure.	All BPM
Pulse	bpm	Heart rate during the reading, kept on the same row.	All BPM

withings_bpm / blood_pressure / readings.csvgrouped

participant_id,timestamp_local,timezone,timestamp_utc,systolic_mmHg,diastolic_mmHg,pulse_bpm,quality_flag,device_model
P048,2026-03-17 08:05:00,Europe/London,2026-03-17T08:05:00Z,131,84,70,ok,BPM Connect

BPM Core / Vision

BP + ECG

Everything the BPM monitors capture, plus a single-lead ECG.

ECG

Metric	Unit	Description	Availability
ECG waveform	µV @ 300 Hz	Single-lead recording (~30 s per session).	Core / Vision
AFib classification	enum	Negative, positive or inconclusive.	Core / Vision
ECG heart rate	bpm	Heart rate during the ECG.	Core / Vision
ECG intervals	ms	QRS, PR, QT and QTc — relevant for pharmacological safety.	Core / Vision

A positive AFib result can trigger a clinical-review flag in studies that enable it. Inconclusive results are excluded.

withings_bpm / ecg / ecg_sessions.csvsummary

participant_id,timestamp_local,timezone,timestamp_utc,afib,hr_bpm,qrs_ms,pr_ms,qt_ms,qtc_ms,duration_seconds,device_model
P048,2026-03-17 09:20:00,Europe/London,2026-03-17T09:20:00Z,negative,68,92,156,388,402,30,BPM Core

Body / Body+ / Body Cardio

Body composition

Metric	Unit	Description	Availability
Weight	kg	Body weight.	All scales
Fat-free mass	kg	Lean mass.	All scales
Body fat	% · kg	Fat ratio and fat mass.	All scales
Muscle & bone mass	kg	Estimated muscle and bone mass.	All scales
Body water	kg	Total body-water mass.	All scales
Pulse wave velocity	m/s	Arterial-stiffness measure.	EU only
Standing heart rate	bpm	Heart rate while standing on the scale.	All scales

withings_scale / body_composition / readings.csvgrouped

participant_id,timestamp_local,timezone,timestamp_utc,weight_kg,fat_free_mass_kg,body_fat_pct,muscle_mass_kg,body_water_kg,bone_mass_kg,quality_flag,device_model
P048,2026-03-17 07:02:00,Europe/London,2026-03-17T07:02:00Z,71.4,55.9,21.7,32.1,40.8,3.1,ok,Body Cardio

Body Scan

medical scale

All Body Cardio measurements, plus advanced segmental and biomarker data.

Metric	Unit	Description	Availability
Visceral fat	index	Estimated visceral fat level.	Biomarker pack
Electrodermal activity	index	Skin electrical activity via foot sensors.	US only
Nerve health	index	Peripheral nerve-health assessment.	EU only
Segmental muscle & fat	per-limb	Distribution across each limb and the trunk.	Body Scan

ScanWatch 2 / Nova

Heart & vitals

Metric	Unit	Description	Availability
Heart rate	bpm	Daily average, minimum, maximum, plus intraday series.	ScanWatch
HRV (RMSSD)	ms	Nightly heart-rate variability.	ScanWatch
SpO₂	%	Blood-oxygen saturation.	SW2 / Nova
Respiration rate	brpm	Breaths per minute.	SW2 / Nova
Body temperature	°C	Body temperature reading.	SW2 / Nova
VO₂ max	mL/kg/min	Estimated fitness.	ScanWatch

Activity & ECG

Metric	Unit	Description	Availability
Steps & distance	count · m	Daily and intraday steps, distance and calories.	ScanWatch
Workouts	session	HR zones, calories, distance and GPS.	ScanWatch
ECG & AFib	µV · enum	Single-lead ECG plus background PPG AFib screening.	ScanWatch

ScanWatch Gen 1 supports a subset of these metrics.

Sleep Analyzer

under-mattress

Sleep

Metric	Unit	Description	Availability
Sleep score	0–100	Overall sleep-quality score.	Sleep Analyzer
Durations & efficiency	s · %	Total, deep, light, REM, efficiency and latency.	Sleep Analyzer
Wake-ups & REM episodes	count	Number of wake-ups and REM episodes.	Sleep Analyzer
Respiration & snoring	brpm · s	Breathing rate, snoring and disturbance intensity.	Sleep Analyzer
Apnea-hypopnea index (AHI)	events/h	Estimated sleep-apnea index. Needs several nights.	US · Sleep Rx
Night series	series	Per-minute stages, HR, respiration and snoring series.	Sleep Analyzer

withings_sleep / sleep / nightly_summary.csvdaily

participant_id,timestamp_local,timezone,timestamp_utc,sleep_score,efficiency_pct,total_sleep_s,deep_s,rem_s,wakeups,avg_rr_brpm,quality_flag,device_model
P048,2026-03-17 00:00:00,Europe/London,2026-03-17T00:00:00Z,82,91,27600,6300,5400,2,14.6,ok,Sleep Analyzer

Thermo

thermometer

Temperature

Metric	Unit	Description	Availability
Body temperature	°C	Temporal-artery temperature. FDA-cleared.	Thermo
Skin temperature	°C	Skin-surface temperature.	Thermo

BeamO

multi-vital

Vitals

Metric	Unit	Description	Availability
Body temperature	°C	Temperature spot reading.	BeamO
Heart rate	bpm	Optical heart-rate spot reading.	BeamO
SpO₂	%	Blood-oxygen spot reading.	BeamO
ECG	µV	Single-lead ECG waveform.	BeamO

Not collected. BeamO's digital stethoscope (audio) is not collected at this time, pending privacy review.

Help Center / Tools / Compare

Compare devices

Line up two or three devices to see which metrics each one captures — Garmin watch tiers against each other, or a Garmin watch against the Withings ScanWatch.

1Choose a device type

2Add devices to compare

Show only differences

High level shows the broad data types each device captures (the number is how many individual metrics it provides in that group); switch to Detailed for every metric. Garmin watches are grouped by feature tier, so capabilities are indicative — a few metrics (e.g. ECG, SpO₂ or skin temperature) can vary by exact model, firmware and region. Rows where the devices differ are highlighted.

No metrics match that filter.