You can sync your Samsung Health data through Google Fit and make the most of WeFitter.
Head over to the Play Store and download Health Sync on your Android device. When you first open the app, you will be prompted to connect your Google Fit account with Health Sync.
Once your Google Fit account is connected, you will need to decide whether you want your Samsung Health data to be synced to Google Fit or vice versa.
If you want Samsung Health data to be synced to Google Fit, make sure that steps and activity tracking are disabled in Google Fit. Otherwise, this will lead to a conflict in data.
Once you have linked Samsung Health and Google Fit, you simply have to add Google Fit in your WeFitter connections as indicated here.