Wellsmith supports iPhone internal activity/steps tracker.  When paired with Wellsmith app, activity/steps will sync directly to the app. 
 
Set up internal step tracker on iPhone: 
 
  1. Open Wellsmith app 
  2. Select … More menu 
  3. Select Devices 
  4. Select Activity Tracker  
  5. Select Use My Phone 
  6. Prompted to enable iPhone to capture steps? Select Yes