This app is a component of the Galaxy Wearable App. But the Galaxy Wearable App must first be installed.

You will also need to grant Galaxy Wearable Application permission from Android Settings in order to use it entirely in Android 6.0. It can be done through Permissions > Watch Active Plugin > Settings > Apps. Moreover, you will also need data on access rights. 
The app service needs the following permissions. The service's default functionality is enabled but not permitted for optional permissions.

With this app, you can use it to synchronize SMS and calls logs with it. You can also do it with your calendar to for your schedules.