Stream Withings data. No Withings API needed.
Withings scales, watches, sleep mats, and blood-pressure monitors sync to Apple Health and Health Connect through the Health Mate app — and Sahha’s SDK reads them into your app as normalized biomarkers and scores, alongside every other source.
- On-device
- Apple Health + Health Connect
- HIPAA
- GDPR
- SOC 2
Free for 30 days · No credit card
- Weight
- 72.4 kg
- Body fat
- 18.2 %
- Resting heart rate
- 56 bpm
Identical schema across 500+ sources
Your users connect Withings. Sahha does the rest.
This is your user’s side of the story — one screen, once. Sahha ingests every Withings signal, normalizes, deduplicates, and delivers it to your service — raw, or as refined intelligence your product can act on.
A Allow "your app"
On-device and permissioned
Withings data is read on the user’s own device, only after they grant Apple Health or Health Connect permission — nothing syncs without consent.
One integration, every source
Permission is per data type, not per brand. Anything that writes to Apple Health or Health Connect — Withings today, a new watch next year — flows through the same SDK with no extra prompt and no new code.
What Withings syncs through Apple Health & Health Connect.
Works with
Body scalesScanWatchSleep AnalyzerBPM ConnectThermoRequest only what you need
You choose exactly which of these signals to request from Apple Health / Health Connect — users are only ever prompted for those, which keeps opt-in rates high.
One schema, every source
Withings, Apple Watch, and Oura all return the same fields and units.
What crosses the bridge
Weight, body composition, blood pressure, sleep, and heart rate pass through the platform; some device-exclusive metrics may not.
Body
5
HealthKit / Health ConnectSahha- bodyMassweightkg
- bodyFatPercentagebody_fat%
- leanBodyMasslean_masskg
- bodyMassIndexbody_mass_index
- heightheightm
Heart & vitals
6
HealthKit / Health ConnectSahha- heartRateheart_ratebpm
- restingHeartRateresting_heart_ratebpm
- bloodPressureSystolicblood_pressure_systolicmmHg
- bloodPressureDiastolicblood_pressure_diastolicmmHg
- oxygenSaturationoxygen_saturation%
- bodyTemperaturebody_temperature°C
Sleep
4
HealthKit / Health ConnectSahha- sleepAnalysis · asleepDeepsleep_stage_deepmin
- sleepAnalysis · asleepCoresleep_stage_lightmin
- sleepAnalysis · asleepREMsleep_stage_remmin
- sleepAnalysis · inBedsleep_stage_in_bedmin
Activity & exercise
3
HealthKit / Health ConnectSahha- stepCountstepscount
- distanceWalkingRunningdistance_walkingm
- activeEnergyBurnedactive_energy_burnedkcal
See a real payload
{
"type": "HKQuantityTypeIdentifierBodyMass",
"value": 72.4,
"unit": "kg",
"startDate": "2026-06-02T07:14:00Z",
"endDate": "2026-06-02T07:14:00Z",
"sourceRevision": { "source": { "name": "Health Mate" } }
// …body fat, blood pressure & sleep samples
}[
{
"category": "body",
"type": "weight",
"value": 72.4,
"unit": "kg",
"periodicity": "daily",
"aggregation": "last",
"startDateTime": "2026-06-02T07:14:00Z",
"endDateTime": "2026-06-02T07:14:00Z"
},
{
"category": "body",
"type": "body_fat_percentage",
"value": 18.2,
"unit": "percent",
"periodicity": "daily",
"aggregation": "last",
"startDateTime": "2026-06-02T07:14:00Z",
"endDateTime": "2026-06-02T07:14:00Z"
}
// …4 more normalized logs
]Data flows when the user’s phone syncs the Health Mate app to Apple Health or Health Connect. Which metrics appear depends on which Withings devices the user owns and what the platform exposes.
Missing a metric you need? Talk to us in the Sahha Slack — if Withings 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.
Reading Apple Health and Health Connect yourself? Here’s the to-do list.
Everything on the left is yours to write, test, and maintain across two platforms. Everything on the right, Sahha already did.
- Integrate Apple Health.
- Then Health Connect, separately.
- Then reconcile the two.
One SDK covers Apple Health, Health Connect, and every cloud source.
- Write the HealthKit queries.
- Write the Health Connect queries.
- Wire up background delivery.
The SDK handles queries, permissions, and background sync.
- Dedupe apps writing the same metric.
- Map dozens of platform types.
- Normalize iOS against Android.
Deduped, typed, one schema — one stream per user.
- Build a sleep model.
- Build an activity model.
- Hire a data scientist.
Scores, archetypes, and insights — built in.
- Apple or Google changes an API.
- You find out in production.
We version the SDK. You never notice.
No Withings developer account needed — Sahha reads what Withings already writes to Apple Health and Health Connect.
Live in an afternoon, not a sprint.
- # Add the Sahha SDKnpm install sahha-react-native01
Add the Sahha SDK
Drop the Sahha SDK into your iOS or Android app — or React Native or Flutter. One dependency covers both Apple Health and Health Connect.
- A
Allow “your app”
ConnectSleepActivityHeart rate02Prompt for health permissions
Call the SDK to show the native Apple Health or Health Connect consent sheet. The user chooses what to share — under your brand. It’s one prompt, ever: permission is per data type, not per brand, so every future source is already covered.
- Your app LIVESleep7h 12mReadiness82Heart rate62 bpm03
Sahha reads and delivers
Once permission is granted, the SDK reads Withings data from Apple Health / Health Connect in the background, normalizes it to one schema, and streams it to your app by webhook or API.
Most teams read live Withings data the same day they add the SDK. The only per-source prerequisite: your user has Withings’s Apple Health / Health Connect sync switched on — most source apps enable it by default.
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.
Withings integration questions
How does Sahha get Withings data?
Withings devices sync through the Health Mate app into Apple Health and Health Connect, and Sahha reads them from there with its mobile SDK — so you get Withings data without integrating the Withings API directly.
Do I need a mobile app to use the Withings integration?
Yes. Because Withings data lives in Apple Health / Health Connect on the user’s device, you embed the Sahha mobile SDK to read it. Cloud-only sources like Oura don’t need the SDK, but on-device sources like Withings do.
Which Withings metrics does Sahha provide?
Weight, body fat, lean mass, BMI, blood pressure, heart rate, resting heart rate, blood oxygen, body temperature, sleep stages, steps, and distance — depending on which Withings devices the user owns — all normalized to Sahha’s schema, plus Sleep and Activity scores and archetypes.
Does it work on both iOS and Android?
Yes. The same Sahha SDK reads Apple Health on iOS and Health Connect on Android, and normalizes both to one schema — you write your integration once.
Is the Withings integration HIPAA and GDPR compliant?
Yes. Sahha is HIPAA and GDPR compliant and SOC 2 certified, and Withings data flows through the same compliant pipeline as every other source.
One API for every other source, too.
Add another wearable or app and the schema, webhooks, and scores are identical — no new pipeline to build.
Start streaming Withings data today.
Connect once. Sahha handles consent, normalization, and real-time delivery — for Withings and every other source.
Free for 30 days · No credit card
- One API for Withings 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