Overview
- Apple announced the feature at its September 9 device event, saying iPhone 18 Pro models can record a signed reference image that acts like a digital negative for later comparison.
- Reference Image works by the Main camera sensor signing pixel‑level telemetry and sending only that telemetry to Apple’s Private Cloud Compute to produce an unalterable reference image.
- Apple will include developer APIs in iOS 27, iPadOS 27, and macOS 27 so third‑party apps can display Reference Images and Apple plans to add Google’s SynthID support in a later update.
- Launch availability is limited: Reference Image will not ship in China and capture will be initially disabled on iPhone 18 Pro devices in the EU while users in the region can still develop and view existing reference images.
- Apple warns the system proves capture and editing history rather than whether a scene was staged, and the approach can be weakened if metadata is stripped, images are recompressed, or cross‑platform standards like C2PA are not used.