A mobile device includes a network connection device capable of forming a communication connection to a cellular network and to a wi-fi network and communicating with an application server and an application capable of communicating through the both cellular and wi-fi networks device to a remote device. The mobile device also includes a context module that records and analyzes information about a user's interactions with data provide to the device by the remote device. The context module modifies an API call between the application and the application server based on analysis of prior usage of the application and a current communication connection of the network device.