Samsung Extension APIs
Tizen Samsung Extension APIs based on C# provides some functionalities of the device's platform capabilities.
Samsung Accessory Protocol (SAP)
Only the Samsung Accessory Protocol (SAP) API is provided for the wearables.
The Samsung Accessory Protocol (SAP) API lets you to exchange data between a Samsung Smart device and an Accessory device using the
Samsung Access Protocol. You can discover SAP services, make Accessory Service Connections and exchange data.
Remote App Control
A remote application control (app control) is a way of interacting with a remote application installed on a remote host device. The remote app control can be used to invoke or launch a remote application explicitly or implicitly based on the available information, such as operation, application package name, and URI, and to receive a reply from the remote device's launched application.
Tizen Circular UI APIs
Consider using Tizen Circular UI for the Galaxy Watch applications.
The Tizen Circular UI is a helpful extension of the Xamarin.Forms for the Galaxy Watch.
The extension provides the beautiful circular UI controls that fit perfectly on the Galaxy Watch.
You can easily create an UI application that follows the Samsung UX using Tizen Circular UI APIs.