1. A computer-implemented method, comprising: displaying, on an electronic display of a computing device, a user interface that includes a voice input control and a virtual keyboard, wherein the virtual keyboard includes a plurality of character entry keys displayed within a first region of the user interface and the voice input control comprises a graphical representation of a microphone; in response to receiving data that indicates user interaction with the voice input control of the user interface: (i) removing the virtual keyboard from the user interface so as to disable an ability of the computing device to receive typed text input; and (ii) enabling a voice input mode of the computing device, including displaying, in place of the virtual keyboard, a visual indication that the computing device is enabled to receive voice input; and detecting, by the computing device, an utterance as a result of the computing device being enabled to receive voice input.