SlideStory (free) is a very nice, fully automated slide show-creation tool. It lets you assemble short slide shows easily, right on your device, and the results look good.
Photos can be grabbed from your camera roll, Facebook, Instagram or Flickr. To make a show, you need at least five and a maximum of 15 slides. When you have your slides selected, you are taken to a page to select filters for the slides, or none at all. From there, you can select some built-in music that works for your subject material, and you can pick an ending slide. The last slide is white type on a black background, and there are some pre-selected slides, or you can add your own text.