If the MzFit Watch app isn’t saving the heartrate or calories associated with your workout, try these steps: From your Apple Watch: Settings -> Health -> Sources: Apps and Services -> MzFit Watch -> Turn On All NOTE: if you can’t find MzFit Watch in Apps and Services, follow these instructions to install it

Install Apple Watch App: Use these instructions to install the Apple Watch app. Grant Apple Watch App Permissions: On your Apple Watch, Launch the “MzFit Watch” app. Click through and grant all permissions requested so your Apple Watch can read and write your statistics during workouts. NOTE: you may have to scroll down on each screen to view and accept permissions.

From your iPhone: Search for “Watch” app and launch it -> Scroll Down -> Available Apps -> MzFit Watch -> Install