The yardstick that all phones, including the Duo, will be measured by.
The iPhone Duo may have hogged the limelight at last week's "Surprise and Shine" event, but it won't be available for a while.
In addition to a tinier Dynamic Island, the iPhone 18 Pro's updates revolve around photography, performance and battery improvements.
Aside from the smaller Dynamic Island and the lovely new Burgundy and Glacier color options, you'd have a hard time spotting any physical differences between the iPhone 17 Pro and 18 Pro.
The iPhone 18 Pro and Pro Max have the same 6.3-inch and 6.9-inch displays as their predecessors, with Ceramic Shield 2 protective glass coverings and ProMotion support for refresh rates up to 120Hz.
Probably the most outstanding of the iPhone 18 Pro's updates are related to its cameras.
While Variable Aperture doesn't specifically fix Portrait mode on the iPhone 18 Pro, it does offer an alternative means to get a pleasant-looking soft focus effect.
While the redesigned, customizable Camera app will be coming to all phones that can upgrade to iOS 27, these Pro tools will be exclusive to the iPhone 18 Pro as they need the variable aperture to work.
Though the iPhone 18 Pro does start at $100 more than the iPhone 17 Pro did last year, Apple also added $100 to the current retail prices of the older iPhones that it still sells. The iPhone 17 Pro launched at a starting price of $1,099, which was $300 more than the iPhone 17.