Use of the Crave app on your mobile device via Wi-Fi will count against your Internet data plan when used at home, but not your cellular data plan.
If you are using a free Wi-Fi network outside the home, the service will not count to your home Internet data plan or cellular data plan.
If you stream content using cellular data, it will count towards your mobile data plan.
*Note - Casting to Chromecast as a guest will result in your mobile phone prioritizing mobile data over wifi. Mobile data may be used during this action.
Learn more about Guest Casting here.