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#18 Its camera can remove objects that don't belong in the image.
Photo effects have been around for decades now, but some things are easier to do than others. One neat trick that the Galaxy S4 can do is remove unwanted objects from a background.
This is done at shoot-time, not at edit-time. The key is the camera can grab a stable picture of a background and then can notice the elements that change over time. Since it has both the background and the changed elements, it's able to remove one or more individual elements from a picture. That means if someone walks across your perfectly composed image of the Statue of Liberty, you can instantly edit him out.
There might be an iPhone app for that, but it comes standard on my Android.
Image courtesy my Samsung S4.