Argentum Camera's interface is inspired by the materials, colors and design of the classical film cameras from the 70s and 80s. It is simple, but functional, not completely flat, not totally following the trend, a balance between the modern sleekness and the classical forms.
It is also the first camera interface that is made with the larger iPhones in mind. In the landscape mode the interface adapts to the shift in the handling and the shutter button moves to the end of the panel placing it right under the photographer's thumb.
Every other design element brought into the app has a functional purpose. The EV compensation scale reminiscent of the classical cameras look makes it easier to select the exact value for your shot. The narrow bar in the bottom changes its size and color depending on the amount of free space.