If you are getting the notification shown below...
Please check your app permissions are switched on, if not, select 'Turn On All'.
If Apple Health is not correctly reflecting what your Garmin wearable (via the 'Connect' app) or your Apple Watch step count says your Steptember steps will appear incorrectly, as our app will pull the incorrect Health app data.
You can resolve with the following steps.
Note: This works for any 3rd party app / wearable that is syncing with Apple Health.
Open the Apple Health app and select the 'Summary' tab at the bottom of the screen
Then tap on 'Steps' and scroll all the way to the bottom of the screen and select 'Data Sources and Access'
Under 'DATA SOURCES' heading you can see that the Connect app (Garmin app) is not first on the list
Tap 'Edit' in the top right corner, then hold down on the 3 bars on the Connect app to move it up into first place and tap 'Done'
The Apple Health app will now preference step data from whichever app is sitting in top spot.
HOT TIP: Always ensure your wearable app is synced with Apple Health each time before you sync with the Steptember app, this will ensure the most accurate data.
Note: This only works for step counts and will not convert other activities into steps e.g. cycling or swimming. These activities need to be entered via the manual activity upload.