If you've ever had trouble finding the right wallpaper for your iPhone, Endless Walls will solve that problem for you. This app simply scrolls through numerous photos from a flickr account and gives you the option to download directly to your iPhone whichever ones you like.
The app is pretty simple overall, but it does have some neat features. The trash icon allows you to report the image for it being against copyright, profane, or not showing up correctly. You can also pause the rotation of the images if you want to not miss any when you close and open the app or put your iPhone down.
Also, you can email a link to the image over to your friends or yourself if you like. But next to that button is the star of the show. The ability to download the image directly to your iPhone. Sometimes this button doesn't respond as fast as you would like, so be careful as pressing it too many times in a row means that you'll end up with a photo album full of dupes.
If you like to switch up your wallpaper, but don't want to be bothered with searching down new images or taking good pictures, definitely download Endless Walls. It's safe to say that this is a highly recommended app for everyone, but probably something you'll be keeping on your last page.