Thanks for your answer. The func update(applicationContext: [String: Any]) -> Void { ... } function is my custom function used to update the applicationContext from the watch-side. The intention is to do some action on the iOS app when the applicationContext is updated from the watch. It was my understanding that this action was supposed to take place on the WCSession object. Is there any other way to achieve this functionality?

Thanks for the answer. The func update(applicationContext: [String: Any]) -> Void { ... } function is my custom function used to update the applicationContext from the watch-side. The intention is to update the applicationContext for the iOS app to do some action. Is there any other way to achieve this funtionality than calling the updateApplicationContext on the session itself?