Whenever the User see the device, I want to show my Application window instead of the default Time

I want my Web Application (for Tizen Wearable 4.0) to perform a bonus task. Whenever the user see his watch (Normally the time is shown to the user) I want the device to show a window of my Web Application instead of the watch Time.

Is it even possible in Tizen Wearable 4.0 ?

I may need to override any default event of the device. Please guide a bit about that specific event if available.