At what stage in the code structure should the call for logging the initial program start point be implemented?

In Android, the call to log the initial program start point is usually implemented in the onCreate() method of the main Activity or in the Application class within its onCreate() method.

The Application class is created before all activities and is a good place to initialize global settings and log the app start.

Example in the Application class:

class MyApp : Application() {
    override fun onCreate() {
        super.onCreate()
        Log.d("MyApp", "Application started")
    }
}

You need to register this class in the AndroidManifest.xml:

<application
    android:name=".MyApp"
    ... >
    ...
</application>