1. A method comprising: receiving an image captured from a mobile device display for a first mobile application; determining a window that includes a chronological set of images, the images each representing a respective screen captured from a display of a mobile device and having an associated timestamp; identifying entities appearing in images in a first portion of the window using text for images in a remaining portion of the window as context to disambiguate ambiguous entity references; and providing the identified entities to the mobile device for customizing a second mobile application executing on the mobile device.