We've seen how the new Liquid Glass design language in iOS 26 will change Apple's own apps, but what about third-party apps? Here's a sneak preview.

Apple has released iOS 26 Beta 4, and with it comes a bold revival of a concept first teased at WWDC 2025, the Liquid Glass interface.

As always, remember that the iOS 26 beta is... a beta. So, back up your phone before making the switch. And as Apple says in its Beta Program FAQ, "Beta software may contain errors or inaccuracies and may not function as well as commercially released software. We encourage you to submit feedback when you encounter these issues.