Samsung’s Dual Shot displays the front-facing camera’s perspective in a tiny box on the screen so you can see the exact image both cameras are capturing. You can also move this box around the screen and customize its shape. The iOS DuoCam app, however, operates a little differently. When clicking the button, the shutter snaps and captures whatever it sees out of the rear facing camera. It then snaps a photo of you using the front-facing lens almost instantaneously. The app’s image library offers the option to combine both photos side by side as one image or keep them separate. These images are only stored within the app, however, and won’t appear in your iOS gallery.