While the iPhone Duo is the first foldable iPhone ever and has some unique features like Duo FaceTime and forthcoming Apple Pencil support, the device lacks some other features available on the iPhone 18 Pro and iPhone 18 Pro Max.

Below, we have listed 10 features that are missing on the iPhone Duo: A dedicated Telephoto camera with up to 8× optical zoom. Instead, the iPhone Duo's main 48-megapixel Fusion camera has "optical-quality" 2× zoom. Variable aperture for the main 48-megapixel Fusion camera, which provides greater control over depth of field in photos and videos. A higher-resolution 18-megapixel Center Stage front camera. On the iPhone Duo, this camera is 12 megapixels. Action button. Face ID. Instead, the iPhone Duo has a Touch ID button. LiDAR Scanner, which measures depth for augmented reality purposes. Other camera features: Pro controls in the Camera app, ProRAW, ProRes RAW, spatial photos and videos, and more.

You can pre-order the iPhone 18 Pro and iPhone 18 Pro Max starting Saturday, September 12 at 5 a.m. Pacific Time, ahead of a Friday, September 18 launch. iPhone Duo pre-orders begin Friday, October 16 at 5 a.m. Pacific Time, and the device will be released on Friday, October 23.