Stream Polar data. No Polar API needed.
Polar watches and heart-rate straps sync to Apple Health and Health Connect through the Polar Flow app — and Sahha’s SDK reads them into your app as normalized sleep, steps, energy, and workout heart rate, alongside every other source.
- On-device
- Apple Health + Health Connect
- HIPAA
- GDPR
- SOC 2
Free for 30 days · No credit card
- Sleep duration
- 7:05 h
- Steps
- 8,430
- Active energy
- 540 kcal
Identical schema across 500+ sources
Your users connect Polar. Sahha does the rest.
This is your user’s side of the story — one screen, once. Sahha ingests every Polar 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
Polar 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 — Polar today, a new watch next year — flows through the same SDK with no extra prompt and no new code.
What Polar syncs through Apple Health & Health Connect.
Works with
Vantage V3Grit X2 ProPacer ProIgnite 3H10Request 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
Polar, Apple Watch, and Oura all return the same fields and units.
What crosses the bridge
Sleep, steps, energy, and workout heart rate pass through the platform; some device-exclusive metrics may not.
Sleep
2
HealthKit / Health ConnectSahha- sleepAnalysis · asleepsleep_durationmin
- sleepAnalysis · inBedsleep_stage_in_bedmin
Activity & exercise
4
HealthKit / Health ConnectSahha- stepCountstepscount
- activeEnergyBurnedactive_energy_burnedkcal
- basalEnergyBurnedtotal_energy_burnedkcal
- workoutActivityTypeexercise_session_*min
Heart & vitals
1
HealthKit / Health ConnectSahha- heartRateheart_ratebpm
See a real payload
{
"type": "HKCategoryTypeIdentifierSleepAnalysis",
"value": "HKCategoryValueSleepAnalysisAsleepUnspecified",
"startDate": "2026-06-02T23:20:00Z",
"endDate": "2026-06-03T06:25:00Z",
"sourceRevision": { "source": { "name": "Polar Flow" } }
// …steps, energy & workout heart-rate samples
}[
{
"category": "sleep",
"type": "sleep_duration",
"value": 425,
"unit": "minute",
"periodicity": "daily",
"aggregation": "total",
"startDateTime": "2026-06-02T23:20:00Z",
"endDateTime": "2026-06-03T06:25:00Z"
},
{
"category": "activity",
"type": "steps",
"value": 8430,
"unit": "count",
"periodicity": "daily",
"aggregation": "total",
"startDateTime": "2026-06-03T00:00:00Z",
"endDateTime": "2026-06-03T23:59:59Z"
}
// …3 more normalized logs
]Polar Flow syncs one way into Apple Health and Health Connect: sleep duration, steps, active and resting energy, and workout heart rate. It does not push continuous heart rate or HRV, so those come from any other source a user connects.
Missing a metric you need? Talk to us in the Sahha Slack — if Polar 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 Polar developer account needed — Sahha reads what Polar 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 Polar 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 Polar data the same day they add the SDK. The only per-source prerequisite: your user has Polar’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.
Polar integration questions
How does Sahha get Polar data?
Polar devices sync through the Polar Flow app into Apple Health and Health Connect, and Sahha reads them from there with its mobile SDK — so you get Polar data without integrating the Polar API directly.
Does Sahha get HRV or continuous heart rate from Polar?
No. Polar Flow only writes workout heart rate, steps, energy, and sleep to Apple Health and Health Connect — it doesn’t sync continuous heart rate or HRV. Sahha fills those from any other source a user connects.
Which Polar metrics does Sahha provide?
Sleep duration, steps, active and resting energy, workout heart rate, and workouts — 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.
Is the Polar integration HIPAA and GDPR compliant?
Yes. Sahha is HIPAA and GDPR compliant and SOC 2 certified, and Polar 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 Polar data today.
Connect once. Sahha handles consent, normalization, and real-time delivery — for Polar and every other source.
Free for 30 days · No credit card
- One API for Polar 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