Apple Health to Fitbit: what you can send back, and what you can't
Updated 1 November 2026. Written by Minima Apps Ltd, the makers of Tandeo, so we mention Tandeo as one option and say plainly where it is limited.
Yes, you can send some Apple Health data back to Fitbit, but not all of it, and it no longer goes to "Fitbit" in the old sense. Fitbit data now lives in Google Health, so anything written back lands there. Weight, body fat, workouts and sleep can be written to Google Health. Steps and heart rate cannot, because Google Health does not accept them from other apps. Tandeo, our iPhone and iPad app, can do the supported part for you.
Can I send Apple Health data to Fitbit after the Google Health change?
Partly. Fitbit data is now served through the Google Health API, and the older Fitbit web API that many apps relied on was turned off on 2 November 2026. Apps that wrote to Fitbit through the old service stopped working or had to be rebuilt. An app built on the Google Health API can still write some data types back, as long as you sign in with your Google account and approve access.
Neither Apple nor Google ships a built-in link between Health and the Fitbit or Google Health app, as far as we know. Check the current Fitbit / Google Health app and Apple's Health app in case that changes. Until then you need a third-party app to move data in this direction.
Which Apple Health data can be written to Google Health?
| Data type | Apple Health to Google Health | Google Health to Apple Health |
|---|---|---|
| Weight | Yes | Yes |
| Body fat | Yes | Yes |
| Workouts | Yes | Yes |
| Sleep | Yes | Yes (with stages) |
| Steps | No | Yes |
| Heart rate | No | Yes |
The table shows what Tandeo supports. The "No" rows are not a gap in one app: Google Health does not accept steps or heart rate written by other apps, so no sync app can send those back. They can only flow from Google Health into Apple Health. Distance, active energy, resting heart rate, heart rate variability and blood oxygen follow the same one-way pattern in Tandeo. If you want the full list, see what Tandeo syncs and in which direction.
Why can't steps and heart rate go back to Fitbit?
Because Google Health does not accept steps or heart rate from other apps. We cannot tell you Google's reasons, and we would rather not guess. What matters in practice is that these values come from the sensors in your Fitbit or other Google Health sources, and Google Health treats them as read-only for third-party apps.
The practical effect is that your Apple Watch or iPhone steps will not appear in the Fitbit or Google Health app, whichever sync app you use. If an app claims to push Apple Health steps into Fitbit, check carefully what it actually does and whether it works with the current Google Health API.
Why would you want to send data back?
- Weight and body fat. If you weigh in on a smart scale that writes to Apple Health, your Google Health history would otherwise have gaps.
- Workouts. Runs, rides or gym sessions recorded on an Apple Watch or another app can show up alongside your Fitbit activity.
- Sleep. If you track sleep with something that writes to Apple Health, you can bring it into Google Health too.
If you are moving the other way, from Fitbit into Apple Health, read our guide on how to sync Fitbit with Apple Health.
How do I send Apple Health data to Google Health with Tandeo?
- Connect Google Health. In Tandeo, sign in with the Google account where your Fitbit data now lives and approve access. If you used another Fitbit-related app before, you will be asked to approve again because the old Fitbit sign-in no longer exists.
- Allow Apple Health access. Tandeo asks for permission through Apple's Health prompts, for the data types you choose.
- Pick the direction. For each of weight, body fat, workouts and sleep, choose Apple Health to Google Health, or both ways where you want it.
- Sync. Tap sync. Pro and Lifetime can also sync in the background, subject to iOS.
Syncing runs on your iPhone or iPad. There is no Tandeo account and no developer server receiving your health data. For details see our privacy policy. Our App Store listing is coming soon, so the app is not available to download yet.
On pricing: the free tier covers steps and sleep from Google Health to Apple Health with manual sync, so writing data back to Google Health needs Pro ($2.99 a month, or $14.99 a year with a 1-week free trial on the yearly plan) or Lifetime ($29.99 once). See the plans and what each includes.
What are the caveats?
Duplicates
Tandeo keeps track of what it has already written in each direction, so a record it copied from Google Health is not sent straight back, and the reverse. Duplicates can still happen when a second app also writes similar data. Sleep and workouts are the usual suspects if your watch, your phone and another app all record them. Review which apps write to Apple Health and turn off the ones you do not need.
Source priority
Apple Health combines data from several sources using a priority list. You can reorder it in the Health app, under the data type, then Data Sources & Access. Google Health makes its own choices about which source to show, so a workout you send back may not be the one that appears in your headline numbers. Check the current Fitbit / Google Health app to see how it treats data from other apps.
Writes land in Google Health
What you send is written to Google Health, not to a separate Fitbit store. It may take a little while to show up in the Fitbit app, and how the Fitbit app displays it is Google's decision. A write-back app can only add data. It cannot make Google Health do anything with that data beyond what Google offers.
Background timing
iOS decides when background work runs, based on battery, connectivity and how often you use an app. Any sync app can be delayed. Opening the app and syncing manually always works.
Related guides
- Google Health and Apple Health: how they connect
- Fitbit not syncing with Apple Health: what to check
- Fitbit and Apple Health sync apps compared
See Tandeo · Support · Privacy
Tandeo is not affiliated with, endorsed by or sponsored by Google, Fitbit or Apple.
Frequently asked questions
Can I sync Apple Health to Fitbit?
Partly. Fitbit data now lives in Google Health, and an app built on the Google Health API can write weight, body fat, workouts and sleep from Apple Health to Google Health. Steps and heart rate cannot be written back, because Google Health does not accept them from other apps.
Can I send Apple Watch steps to Fitbit?
No. Google Health does not accept steps from other apps, so no sync app can send Apple Watch or iPhone steps into the Fitbit or Google Health app. Steps can only flow from Google Health into Apple Health.
Will my workouts from Apple Health appear in the Fitbit app?
They can be written to Google Health, which is where Fitbit data now lives. How and when they appear in the Fitbit app is up to Google, so check the current Fitbit / Google Health app. Opening Tandeo and syncing manually is the quickest way to push new workouts.
Will writing data back create duplicates?
Tandeo tracks what it has already written in each direction, so it does not copy the same record back and forth. Duplicates can still appear if another app writes the same data. Apple Health combines sources using a priority list you can change under Data Sources & Access.
Do I need a Tandeo account or a server for this?
No. Tandeo runs on your iPhone or iPad, has no account, and has no developer servers receiving your health data. You sign in to Google to connect Google Health, and the app is not yet on the App Store because the listing is coming soon.
Is sending data back to Google Health free?
No. The free tier covers steps and sleep from Google Health to Apple Health with manual sync. Writing Apple Health data to Google Health needs Pro ($2.99 a month or $14.99 a year) or Lifetime ($29.99 one-time).