Systems and methods for indexing onscreen content on a mobile device are provided. For example, a method can include determining, using an index for a user that associates key items with images of screens captured from a mobile device of the user, that a first key item is responsive to a query initiated at the mobile device, and identifying responsive images, the responsive images being associated with the first key item. The method may also include highlighting, in the responsive images, areas corresponding to the first key item, and providing a search result to the mobile device that includes portions of the responsive images. The portions of the responsive images may be areas corresponding to the first key item in the images.