Apple AI features in iOS 27.2 update add SynthID marks
With Apple AI features in the iOS 27.2 update, Image Playground creations carry Google's invisible SynthID mark, which survives cropping, filters and compression.
iOS 27.2 applies Google's SynthID watermark to images created in Image Playground.
Newly generated images are always marked; AI edits are marked only when changes are substantial.
SynthID sits in the pixels, not metadata, and Google says it survives cropping, filters and compression.
iPhones cannot detect the mark; Google's SynthID Detector, open to all since early October, is required.
Apple is using a rival's system so the same watermark can be checked in one place.