Start this applet with its widget. Enter search words and it generates a notification with a link to a Google search of images from the jw website. Tap the noti (long press on iOS) to browse what Google has. Download images by visiting the page with the image.
Note: You can easily do this search yourself (i.e., without this applet) by going to https://images.google.com and entering site:jw.org followed by the words that match images you want. This video shows how: https://youtu.be/TwrR2rveTlU