What is Health Sync?
Health Sync is a data bridge that copies your activities and health metrics from one fitness app to another. Say your watch logs to Garmin Connect but you also want everything in Strava, or you record on Strava and want it pushed into Apple Health. Health Sync runs that transfer in the background so you stop doing it by hand.
It is built by appyhapps.nl B.V., a small company in the Netherlands. The app started on Android and added an iOS version in 2024. Strava is listed on both sides of the arrow in the current store listings (a source you pull activities out of and a destination you push them into), and both apps are still being updated, the iOS build as recently as October 2026.
Key Features
Wide app support
On Android, Health Sync reads from Coros, Diabetes:M, fatsecret, Google Health (Fitbit), Garmin Connect, Google Fit, Health Connect, HUAWEI Health, MedM Health, Oura, Polar Flow, Samsung Health, Strava, Suunto and Withings. It can write to a long list too, including Strava, Intervals.icu, Runalyze, Smashrun, Selfloops and Samsung Health. Google is ending direct Google Fit integrations at a date in 2026 it hasn't set yet, and after that Health Sync reaches Google Fit through Health Connect instead; until then the developer recommends the direct sync. iOS is a shorter list on both sides: it reads from Apple Health, Coros, Google Health (Fitbit), Garmin Connect, HUAWEI Health, Oura, Polar Flow, Strava and Suunto, and writes to Apple Health, Coach Watts, Coros, Google Health (Fitbit), Intervals.icu, MyLibreo, Runalyze, Selfloops, Strava, SurvonMD, Suunto and TrainItAll.
Activity filtering
You can set filters so not every activity gets copied across. Filter by activity type, by duration, or by distance, which keeps a 4-minute dog walk out of your serious training log if that is what you want. The developer has said the filter options grow based on user requests.
Historical sync
Beyond syncing new activities going forward, Health Sync can backfill older data and manually resync days in the past. This is the one feature held back during the free trial, so it unlocks once you buy a license. Two sources cap what you can pull back: Garmin Connect gives five years of activities and two years of everything else, and Polar Flow gives no history at all.
No "Strava tax" on distance
A common complaint with syncing from Samsung Health or Apple Health is that Strava recomputes the distance from the GPS track and comes up a little short, the so-called Strava tax. It's usually a tenth of a kilometre or less, but that can be the difference between Strava crediting a full race distance or a distance PR and not. Health Sync sends the distance the source app recorded, so the number you see in Strava is the number your watch tracked.
Background, hands-off transfers
Once you pick a source and a destination and set your filters, the app keeps the two services in step on its own. You set it up once instead of exporting and importing files every time you train. On iOS the background run happens a few times an hour rather than continuously, which is an iOS restriction rather than an app choice.
Who It's For
Health Sync makes sense if you live across more than one fitness ecosystem. A Garmin owner who wants a clean Apple Health record, a Fitbit user feeding Strava, anyone whose coach reads one platform while their watch writes to another. If all your gear and apps already talk to each other, you probably do not need it. If they do not, this is the glue.
Which apps can Health Sync connect to Strava?
Strava works in both directions. On Android you can pull activities from sources like Garmin Connect, Fitbit, Samsung Health, Huawei Health, Polar, Oura and Withings into Strava, or push Strava data out to apps like Health Connect, Intervals.icu and Runalyze. On iPhone, Apple Health works in both directions. The iOS app supports a smaller set of sources and destinations.
How much does Health Sync cost?
You start with a one week free trial. After that you buy it outright. The iOS in-app purchase is called No-Expiration License and is $3.99 on the US App Store; Google Play also offers a six-month subscription as an alternative to the one-time purchase. Neither store price is published on the Health Sync website, and both vary by region. The license covers everything except the Withings integration, which carries its own extra subscription because that connection costs the developer money on an ongoing basis.
What can I do during the free trial?
Everything except syncing historical data or manually resyncing days in the past. Forward syncing of new activities, all the supported apps, and the activity filters are all available so you can test the setup before paying. The clock starts at first use, and the app only syncs from that moment onward until you pay.
Can I stop certain activities from syncing to Strava?
Yes. The activity filter lets you exclude activities by type, duration or distance, so short or low-value sessions never make it across to Strava.
