If you just want quick results, you'll also find a randomize button in the lower right that automatically picks from shapes, zooms, and filters so you can make a Fragment image right away.
Fine-tuning your image
From the same editing screen, there is an additional set of options for tuning both the fragment and the background image by swiping up from the bottom. Be careful not to swipe up from the very bottom, however, because this motion can also bring up the iOS 7 system tools screen.
This extra set of tools lets you adjust brightness, contrast, additive color, blur, invert, and desaturation effects using a swipeable slider. Just like with other changes you make, you can use the toggle at the top to adjust the background image or the fragment shape. A separate wheel at the bottom also lets you add a little bit of color to your photo (or fragment) for some really cool effects.
When you're finished, you can save the project to your photo library, upload to Instagram, Facebook, or Twitter, or open it in another supported photography app.
Get some inspiration
Fragment has a separate section called Inspiration on the first screen to show you what others have done with the app. Here you'll find all sorts of landscapes and creative photos that really show where the app truly shines. Once you see some of the ideas people have come up with, it's fun to play around with the tools to see if you can create similar visual effects.
Fragment is not your everyday photo filter app that you can find everywhere at the App Store. For that, you'll want something like Instagram, Camera+, PhotoToaster, or any of a host of other apps to make those kind of photo projects.
Instead, I think Fragment is more for the artistic smartphone photographer who is looking to make new and unique projects. With the way the app is laid out with intuitive controls and a wide range of editing options, just about anyone can make complex-looking art projects as long as you follow the step-by-step process and use a little bit of imagination.