'We did all this work with physical glass... simulating as closely as we could the actual properties of glass' for Liquid Glass, says Apple's Craig Federighi. Then it went further

Liquid Glass. It's an umbrella term for interface changes across virtually every Apple platform, but it's also evocative of an intangible thing; digital, transparent, amorphous glass that glides, flexes, and responds to touch in a way real glass could never do.

Just hours after Apple unveiled, at WWDC 2025, the biggest change to iOS since iOS 7 13 years ago, I, along with Tom's Guide Global Editor-in-Chief Mark Spoonauer, sat down with Apple's Senior Vice President of Software Engineering Craig Federighi and Apple Global VP of Marketing Greg Joswiak to talk about everything the company unveiled during its 90-minute keynote.

We talked about Siri, Apple Intelligence, and iPadOS's remarkable transformation, but it was when we asked about the inspiration for Liquid Glass that the pair became most animated.

Federighi first confirmed what rumors have been suggesting for months: that the ...