You can link your iHealth MyVitals account to select third-party apps for easy data syncing.
At this time, iHealth supports integration with Apple Health and Fitbit. Once authorized, your health data will automatically update in the connected app, so you can track all your information in one place.
How to Authorize Apple Health or Fitbit On iOS Devices:
Open the iHealth MyVitals app and tap Account in the lower right corner.
Under DATA, select Authorize 3rd Party Apps.
Choose Apple Health or Fitbit, and tap on your selection.
Tap Authorize to confirm.
A notice will appear saying you are about to add a new user to your iHealth app — tap Done.
Your Apple Health or Fitbit app is now connected to iHealth MyVitals. (How to know its authorized? the button below will say unauthorize)
Note: To remove the connection at any time, follow the same steps and select Unauthorize.