💡 Quick Answer
The Polar Flow app syncs with Apple Health on iPhone and with Health Connect on Android. Polar documents the Apple Health link as one way, from Flow to Health, and the two lists differ.
- Turn it on: Polar Flow app → More → General settings → Apple Health toggle (iPhone), or Health Connect toggle (Android).
- Both platforms: steps, workouts, workout heart rate, sleep and weight.
- Health Connect only: oxygen saturation, resting heart rate, VO2 max, height, speed and exercise routes.
- Not synced: Polar says continuous heart rate is not synced to Apple Health, and HRV is on neither list.
Polar publishes one help page for Apple Health and one for Health Connect, and the two lists are not identical. This guide follows those pages. For a wider look at the platforms, see the Apple Health vs Health Connect guide.
What Polar Flow Shares With Apple Health and Health Connect
The Notes column keeps Polar's wording where it adds a limit.
| Data type | To Apple Health | To Health Connect | Notes |
|---|---|---|---|
| Steps | ✓ Steps | ✓ Steps | Apple Health: step amount measured by the Polar device. Health Connect: per day. |
| Distance | ✓ Distance, within Workouts | ✓ Distance | Health Connect: if the session has distance information. |
| Active calories | ✓ Active Energy | ✓ Active calories burned | Apple Health: calories burned during workouts. Health Connect: excludes BMR calories. |
| Resting / total calories | ✓ Resting Energy | ✓ Total calories burned | Apple Health: calories burned outside workouts, such as BMR. Health Connect: active plus BMR. |
| Workouts | ✓ Workouts | ✓ Exercise | Apple Health: type, duration, distance, start and end time, total active energy and average heart rate. Health Connect: start and end time, laps if available. |
| Heart rate | ✓ Heart rate during workouts | ✓ Heart rate during workouts | Polar lists workout heart rate only for both platforms. |
| Continuous heart rate | ✗ Not synced | Not listed by Polar | Polar says continuous heart rate is not synced to Apple Health. |
| Resting heart rate | Not listed by Polar | ✓ Resting heart rate | Health Connect: from physical settings. |
| HRV | Not listed by Polar | Not listed by Polar | |
| Sleep and sleep stages | ✓ Sleep Analysis | ✓ Sleep, including stages | Apple Health: duration, fall-asleep and wake-up times. Health Connect: start, end and stages. |
| SpO2 | Not listed by Polar | ✓ Oxygen saturation | Health Connect: SpO2 record. |
| Respiratory rate | Not listed by Polar | Not listed by Polar | |
| Skin / body temperature | Not listed by Polar | Not listed by Polar | |
| Weight and body composition | ✓ Weight | ✓ Weight and Height | The value saved in the Polar Flow app settings. Body composition is not listed. |
| VO2 max | Not listed by Polar | ✓ VO2 max | Health Connect: from physical settings. |
| Cycle tracking | Not listed by Polar | Not listed by Polar | |
| Polar's own scores | Not listed by Polar | Not listed by Polar | They stay in Polar Flow, apart from VO2 max on Health Connect. |
How to Connect Polar Flow to Apple Health
As of October 2026, Polar documents these steps in the Flow app on iPhone:
- Open the Polar Flow app, tap More at the bottom right and go to General settings.
- Tap the Apple Health toggle to enable the connection.
- Select which categories to sync to the Health app, or tap Turn All Categories On.
- Tap Allow at the top right to finish the connection.
After this, Polar says all new data in the Flow app will sync to Apple Health. To disconnect, open Apple Health, tap the profile picture or initials at the top right, go to Apps, select Polar Flow and tap Turn All Categories Off.
How to Connect Polar Flow to Health Connect
Health Connect is built into Android 14 and later and is a Play Store app on Android 13 and earlier. Google documents the way in as follows:
- On Android 14 and up, open Settings, then tap Security and privacy → Privacy Controls → Health Connect.
- On Android 13 and lower, download the Health Connect app from the Play Store, open Settings, tap Apps → All apps → Health Connect, then tap Open.
Polar documents these steps in the Flow app on Android:
- Open the Flow app and go to General settings.
- Turn on Health Connect. Depending on the Android version, Flow redirects to the Google Play Store if Health Connect is not installed, and the app should launch automatically afterwards.
- Choose the data to share with Health Connect and tap Allow.
- To change the shared data later, tap Manage permissions.
Polar says Health Connect receives new Flow data as long as the connection stays active. To disconnect, turn the toggle off.
Does Polar Flow Read Data From Apple Health or Health Connect?
No, for Apple Health. Polar says that data can only sync from the Polar Flow app to Apple Health, and that syncing data from the Health app to the Flow app is not possible.
For Health Connect, Polar's page describes only data going from Flow to Health Connect and lists no data that Flow reads back.
What Stays Inside the Polar Flow App
Polar's pages list the data above and nothing else. Anything missing is not documented as shared:
- Continuous heart rate is not synced to Apple Health; only heart rate during workouts is.
- HRV, respiratory rate, temperature and cycle tracking are on neither list.
- Polar's own scores and analysis stay inside Polar Flow.
- SpO2, resting heart rate and VO2 max are listed for Health Connect but not for Apple Health.
For background on reading HRV, see the HRV monitoring guide.
Why Your Numbers Don't Match
- Source priority. Polar says Apple Health might not use all the data if Polar Flow is not prioritized first. In Health, tap a metric that Flow syncs, such as Steps, scroll to the bottom, tap Data Sources & Access, tap Edit if Polar Flow is not first, then drag it to the first position and tap Done.
- Re-sync. In the Flow app go to More → General settings and tap Sync now under the Apple Health toggle. Polar says this syncs the last two weeks of data again.
- iPhone Fitness tracking. To use only Flow data, Polar says to disable Fitness tracking under Settings → Privacy → Motion & Fitness.
- Health Connect merges. Health Connect merges data when several apps write the same type, such as steps, and gives priority to the app higher on the list. Change the order under Manage Data → Data sources and priority.
See the sleep tracker comparison for other devices, or the guides for Garmin, COROS and Oura.
Frequently Asked Questions
Does Polar Flow sync with Apple Health?
Yes, one way. Polar says data syncs from the Flow app to Apple Health, and that syncing data from the Health app to Flow is not possible. The data is active energy, workout heart rate, resting energy, sleep analysis, steps, weight and workouts.
How do I connect Polar Flow to Health Connect?
Open the Flow app on Android, go to General settings, turn on Health Connect, choose the data to share and tap Allow. Polar says the Flow app may send you to the Play Store first if Health Connect is not installed.
Does Polar Flow sync sleep to Apple Health?
Yes. Polar lists Sleep Analysis, which covers sleep duration, the time of falling asleep and the time of waking up. Polar lists stages from Polar sleep phases for Health Connect.
Why is my Polar data not showing in Apple Health?
Check that Apple Health is still enabled under General settings in the Flow app, tap Sync now to re-send the last two weeks, and make sure Polar Flow is first under Data Sources & Access for the metric. Polar also notes that continuous heart rate is not synced.
Can Polar Flow read data from Apple Health?
No. Polar says syncing data from the Health app to the Polar Flow app is not possible. The Apple Health connection only sends data out of Flow.
Using Polar Flow Data in UltraFit360
UltraFit360 reads from Apple Health and Health Connect, so whatever Polar Flow writes there becomes available to it once you grant permission. Based on Polar's lists, that includes steps, workouts, workout heart rate, sleep and weight, plus SpO2 and resting heart rate on Android. HRV is not on either list.
UltraFit360 does not connect to the device maker directly; the route runs through Apple Health or Health Connect. Open the Polar Flow app after a workout so the watch syncs first. See how the AI fitness tracker uses that data alongside meals and workouts, or browse all UltraFit360 features.
Sources
- Polar Support: Connecting Polar Flow with Apple Health — checked on October 9, 2026
- Polar Support: Connecting Polar Flow app to Health Connect — checked on October 9, 2026
- Android Help: Get started with Health Connect — checked on October 9, 2026
- Android Help: Manage your Health Connect data — checked on October 9, 2026
- Apple Support: Manage Health data on your iPhone, iPad, or Apple Watch — checked on October 9, 2026
UltraFit360 brings your workouts, nutrition and wearable data together. See how the AI fitness tracker works with Apple Health and Health Connect.
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Sync Apple Health or Health Connect with UltraFit360 — get SSR scores, recovery insights, and weekly reports.