Apple has released the fourth beta of iOS 26, introducing changes to the Liquid Glass interface, the return of Apple Intelligence Notification Summaries for news, and updates to the Camera app and CarPlay wallpapers. Additional features include a new toggle in the Weather app, a renamed "Reduce Loud Sounds" option, and enhancements to call screening and the Passwords app. These updates are set to improve user experience and functionality ahead of the public beta release.