Samsung has retired the Fitness with gear app and replaced it with the new S Health app. The new data about all your health activities will now be integrated into the new S Health app.
Samsung had launched the S Health app along with the Galaxy S4 that helps users track health and fitness related data. The app runs the latest version 3.5.1 on Galaxy Note 4 while it stil runs the older version 2.5 on other Galaxy devices. This makes the app incompatible to run with Gear Fit and other Gear accessories.
Hence, to bring a uniformity Samsung has closed the Fitness with Gear app and is importing all the data to the new S Health app. The updated app brings a newer user interface to older devices and syncs data with Gear Fit as well as other similar devices. A new addition to the app is the Comfort Level that displays Thermo-hygrometer but the heart-rate measurement and the Stress Levels have been left out.
The update will hit the app automatically but users can manually check for an update.