Integrates with your iPhone
When connected to your phone, the camera looks and feels like a grip.
Turn it on, flip it out
Sliding the cover down turns the camera on; pushing it down again flips out the Lightning connector.
Front
The nub on the cover is supposed to provide a tactile reminder of where your fingers should rest.
Fingers
My only complaint about the design is that it's not quite big enough to not have to worry about keeping your fingers away from the lens.
Connector
Since it uses a standard Lightning connector, it works with both the iPhone and iPad. It's not really ergonomically friendly for handheld use with the iPad, though. The connector mount rotates backward and forward 60 degrees, and the red dot indicates vertical.
Back
The back has a small status touchscreen display, a covered compartment and a strap hook.
Status LCD
Swiping on the status display switches you between still and video modes.
Under the hatch
Under the hatch on the back are the microSD slot and the USB connector. The camera charges via USB.
DxO One
The name emblazoned on the side.
Top
A big shutter button occupies the top. It supports half-press prefocus.
Connecting
When you connect the camera to your device and turn it on, the app immediately launches if you're on the home screen.
Flip for selfies
When the camera is attached in the reverse direction it becomes a FaceTime/selfie shooter. As with the iOS app, you can flip the preview to show the correct image.
DxO One
The rotating mount makes it possible to shoot overhead or below the waist, and allows the whole system to sit flat when you put it down.
App
The full-featured app supports manual, semimanual and automatic modes for stills, but video is solely automatic.