Apple Reference Image gives iPhone 18 Pro owners verifiable evidence of what the camera captured, offering a new defense against convincing AI-generated and edited images.
The opt-in feature uses a new sensor in the Main camera that can sign every pixel it sees. Taking a photo in Reference mode captures signed sensor data that Private Cloud Compute turns into an unalterable reference image.
The Photos app displays that reference beside the main photo like a digital negative, allowing viewers to compare the two and determine whether edits were made. Apple's official release says the feature is designed for photojournalists, photographers, and everyday viewers.
Apple Reference Image first appeared in beta code in August. Apple has now confirmed that APIs in iOS 27, iPadOS 27, and macOS 27 will let third-party apps display reference images.
Image metadata and upcoming support for Google's SynthID standard will also help identify pictures generated or edited with AI. SynthID support will arrive in a software update later this year and will apply to most edited images, depending on the changes made.
Reference Image can show what the sensor saw when the shutter was pressed, but it can't establish that the photographed scene wasn't staged or presented without context. The feature provides evidence of capture and editing history rather than proof that every claim attached to an image is true.
Reference Image won't be available in China at launch. Capture will also be unavailable on iPhone 18 Pro models in the European Union initially, although devices running the OS 27 versions will still be able to develop and view reference images.
