Apple Health (HealthKit) Integration — Read HealthKit Data with One SDK

How it works

Your users connect Apple Health. Sahha does the rest.

This is your user’s side of the story — one screen, once. Sahha ingests every Apple Health signal, normalizes, deduplicates, and delivers it to your service — raw, or as refined intelligence your product can act on.

A

Allow "your app"

Sleep

Activity

Heart rate

Connect

9:41LIVE

82READY

Sleep7h 12m

Steps5,993

Heart rate62 bpm

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Sahha

Permissions handled

Encrypted in transit

History backfilled

Background sync enabled

Cleaning · deduping · scoring

Raw data logs Biomarkers Scores Insights Archetypes Tags

Real-time webhooks

Always in sync

Query via API

Access controlled

Your service

Waiting for data…

On-device and permissioned

Apple Health data is read on the user’s own device, only after they grant Apple Health permission — nothing syncs without consent.

One integration, every source

Permission is per data type, not per app. Hundreds of sources write to Apple Health — every one of them, and every future one, flows through the same SDK with no extra prompt and no new code.

Data coverage

Everything Sahha reads from Apple Health.

Works with iPhoneApple WatchAirPodsHundreds of HealthKit apps

Request only what you need
You choose exactly which sensors to request — the native Apple Health sheet shows only those, which keeps opt-in rates high.
One schema, every source
An Apple Watch workout and a Garmin run land as the same fields and units — Apple Health, Health Connect, and cloud APIs all normalize identically.
The full read surface
Every HealthKit type Sahha supports is cataloged below — the complete read surface, in Sahha’s normalized schema.

Sleep

5

HealthKitSahha

sleepAnalysis · asleepDeepsleep_stage_deepmin
sleepAnalysis · asleepCoresleep_stage_lightmin
sleepAnalysis · asleepREMsleep_stage_remmin
sleepAnalysis · awakesleep_stage_awakemin
sleepAnalysis · inBedsleep_stage_in_bedmin

Heart & vitals

13

HealthKitSahha

heartRateheart_ratebpm
restingHeartRateresting_heart_ratebpm
walkingHeartRateAveragewalking_heart_rate_averagebpm
heartRateVariabilitySDNNheart_rate_variability_sdnnms
bloodPressureSystolicblood_pressure_systolicmmHg
bloodPressureDiastolicblood_pressure_diastolicmmHg
bloodGlucoseblood_glucosemg/dL
oxygenSaturationoxygen_saturation%
respiratoryRaterespiratory_ratebr/min
vo2Maxvo2_maxmL/kg/min
bodyTemperaturebody_temperature°C
basalBodyTemperaturebody_temperature_basal°C
appleSleepingWristTemperaturesleeping_wrist_temperature°C

Activity & exercise

11

HealthKitSahha

stepCountstepscount
flightsClimbedfloors_climbedcount
distanceWalkingRunningdistance_walkingm
activeEnergyBurnedactive_energy_burnedkcal
basalEnergyBurnedbasal_energy_burnedkcal
workoutActivityTypeexercise_session_*min
appleExerciseTimeexercise_timemin
appleStandTimestand_timemin
appleMoveTimemove_timemin
timeInDaylighttime_in_daylightmin
activitySummaryactivity_summary

Body

6

HealthKitSahha

heightheightm
bodyMassweightkg
bodyMassIndexbody_mass_indexkg/m²
bodyFatPercentagebody_fat%
leanBodyMasslean_masskg
waistCircumferencewaist_circumferencem

Nutrition

13

HealthKitSahha

dietaryEnergyConsumedenergy_intakekcal
dietaryWaterwater_intakeL
dietaryProteinprotein_intakeg
dietaryCarbohydratescarbohydrate_intakeg
dietaryFatTotalfat_intakeg
dietaryFatSaturatedfat_saturated_intakeg
dietaryFatMonounsaturatedfat_monounsaturated_intakeg
dietaryFatPolyunsaturatedfat_polyunsaturated_intakeg
dietaryCholesterolcholesterol_intakemg
dietarySugarsugar_intakeg
dietaryFiberfiber_intakeg
dietaryCaffeinecaffeine_intakemg
dietaryVitaminA … dietaryZincvitamin & mineral intakes ×27mg · µg

Cycle & reproductive

5

HealthKitSahha

menstrualFlowmenstrual_flow
intermenstrualBleedingintermenstrual_bleeding
cervicalMucusQualitycervical_mucus
ovulationTestResultovulation_test
sexualActivitysexual_activity

Demographics

2

HealthKitSahha

biologicalSexgender
dateOfBirthdate_of_birth

See a real payload

HealthKit · sleep

{
  "sampleType": "HKCategoryTypeIdentifierSleepAnalysis",
  "value": "asleepDeep",
  "startDate": "2026-06-02T23:18:00Z",
  "endDate": "2026-06-03T00:36:00Z",
  "sourceRevision": { "productType": "Watch7,2" }
  // …heart rate, steps & workout samples
}

Sahha · normalized

[
  {
    "category": "sleep",
    "type": "sleep_stage_deep",
    "value": 78,
    "unit": "minute",
    "periodicity": "daily",
    "aggregation": "total",
    "startDateTime": "2026-06-02T23:18:00Z",
    "endDateTime": "2026-06-03T06:52:00Z"
  },
  {
    "category": "activity",
    "type": "steps",
    "value": 10412,
    "unit": "count",
    "periodicity": "daily",
    "aggregation": "total",
    "startDateTime": "2026-06-03T00:00:00Z",
    "endDateTime": "2026-06-03T23:59:59Z"
  }
  // …3 more normalized logs
]

Apple Health is iOS-only — on Android, the same Sahha SDK reads Health Connect instead. Cycle-tracking types arrive as Sahha Tags (categorical events) rather than numeric biomarkers.

Missing a metric you need? Talk to us in the Sahha Slack — if Apple Health captures it, we can usually add support.

Get more than just raw data

Sahha turns these signals into biomarkers, scores, archetypes, and insights — the modeling done for you.

Biomarkers

Scores

Archetypes

Insights

Building directly on HealthKit? Here’s the to-do list.

HealthKit is a deep, powerful API — and everything on the left is yours to write, test, and maintain. Everything on the right, Sahha already did.

Direct HealthKit

With Sahha

Getting the data

Direct HealthKit

Write anchored + observer queries per type.
Configure background delivery per type.
Handle permission states Apple won’t let you inspect.

With Sahha

One enableSensors() call — queries, background delivery, and permissions handled.

Android too

Direct HealthKit

Redo everything on Health Connect.
Reconcile two record models.
Maintain both forever.

With Sahha

The same SDK reads Health Connect on Android — one schema across both.

Keeping it clean

Direct HealthKit

Dedupe iPhone + Watch double-counting.
Convert units per type.
Handle timezone and DST edge cases.

With Sahha

Deduped, typed, one schema — one stream per user.

Turning it into insight

Direct HealthKit

Build sleep, activity & readiness models.
Validate them against research.
Hire a data scientist.

With Sahha

Scores, archetypes, and insights — built in.

Keeping it alive

Direct HealthKit

New iOS versions add and change types.
You find out in production.

With Sahha

We version the SDK. You never notice.

You stay in control of scope — specify exactly which sensors your product needs, and only those are ever requested from the user.

Setup

Live in an afternoon, not a sprint.

# Add the Sahha SDKnpm install sahha-react-native
01
Add the Sahha SDK
Drop the SDK into your iOS app — native Swift, React Native, Flutter, Ionic, or Expo.
Capability enabled
Background delivery
Permissions declared
02
Enable HealthKit in Xcode
Add the HealthKit capability, background delivery, and usage descriptions to your project — a one-time checklist from the docs.
A
Allow “your app”
Sleep
Activity
Heart rate
Connect
03
Prompt for permissions
Call enableSensors() from a button with just the sensors you need. The user sees the native Apple Health consent sheet — in your app, under your brand.
Your app LIVE
Sleep7h 12m
Readiness82
Heart rate62 bpm
04
Sahha reads and delivers
The SDK collects in the background via HealthKit background delivery, normalizes everything to one schema, and streams it to you by webhook or API.

Start building Read the SDK docs

Most teams read live Apple Health data the same day they add the SDK.

Destinations

Route it into your stack.

Sahha streams every update to your webhook — and a step-by-step guide takes it the rest of the way into your database, CDP, or messaging tool.

FAQ

Apple Health integration questions

How does Sahha read Apple Health data?

Sahha’s SDK runs inside your iOS app and reads HealthKit on the user’s device after they grant permission in the native Apple Health consent sheet. The data is normalized on Sahha’s pipeline and delivered to your backend by webhook or REST API.

What data can Sahha read from Apple Health?

80+ HealthKit types: sleep stages, steps, workouts, heart rate, resting heart rate, HRV (SDNN), blood pressure, blood glucose, SpO₂, respiratory rate, VO₂ max, body and wrist temperature, height, weight, body fat, lean mass, full dietary nutrition, cycle tracking, and demographics. The complete catalog is on this page.

Can Sahha read Apple Health without a mobile app?

No — HealthKit data lives on the user’s device and Apple provides no cloud API for it. You embed the Sahha SDK in your iOS app; from there Sahha delivers the data to your backend, so the rest of your stack never touches HealthKit.

Does this cover Apple Watch?

Yes. Apple Watch syncs its sleep, workouts, and heart data into Apple Health, and Sahha reads it from there — along with data from every other device and app the user has connected, like Oura, Garmin, or WHOOP.

Do users have to approve every data type?

Apple Health permissions are per-type, and you choose exactly which sensors to request. Requesting only what your product needs improves opt-in rates and App Store review outcomes.

Is the Apple Health integration HIPAA and GDPR compliant?

Yes. Sahha is HIPAA and GDPR compliant and SOC 2 certified. Data is read only with user consent and encrypted in transit.

Sources

Every source that flows through Apple Health.

Each of these apps and devices writes its data to Apple Health — so once your users grant permission, they all arrive through the same SDK in one normalized schema. No per-brand integrations.

+ Cloud API These sources also offer a deeper dedicated integration — Sahha pulls from the brand’s own API server-side, no mobile app required. Their pages cover both paths.

Start streaming Apple Health data today.

Connect once. Sahha handles consent, normalization, and real-time delivery — for Apple Health and every other source.

Start building Book a demo

Free for 30 days · No credit card

One API for Apple Health and every other source
Real-time webhooks + on-demand REST, one normalized schema
Scores, archetypes & insights — no modeling required
HIPAA, GDPR & SOC 2 · your brand on the consent screen

Every Apple Health signal. One SDK.

Your users connect Apple Health. Sahha does the rest.

On-device and permissioned

One integration, every source

Everything Sahha reads from Apple Health.

Request only what you need

One schema, every source

The full read surface

Sleep

Heart & vitals

Activity & exercise

Body

Nutrition

Cycle & reproductive

Demographics

Get more than just raw data

Biomarkers

Scores

Archetypes

Insights

Tags

Building directly on HealthKit? Here’s the to-do list.

Live in an afternoon, not a sprint.

Add the Sahha SDK

Enable HealthKit in Xcode

Prompt for permissions

Sahha reads and delivers

Route it into your stack.

Apple Health integration questions

Every source that flows through Apple Health.

Start streaming Apple Health data today.