Apple has released the 6th beta version of iOS 11.3 for users participating in the iOS beta testing program.
The new beta build presumably focuses on continued bug fixes and refinements to the beta software for iPhone and iPad, marching the system software closer to the inevitable public release.
Users enrolled in the iOS beta testing program can find iOS 11.3 beta 6 available now from the Software Update section of the Settings application.
iOS 11.3 includes new Animoji icons for iPhone X, support for iMessages in iCloud, and various improvements to other system features and apps like Health app, ARKit, and a Battery Health toggle setting to turn off or on battery performance throttling on devices with older batteries.
The release schedule for iOS appears to be accelerating, as iOS 11.3 Beta 5 was released just a few days ago alongside other beta system software. This could suggest we’ll see a final version of iOS 11.3 in the coming weeks. Perhaps coincidentally, Apple has sent invitations to an education themed event scheduled in Chicago for March 27.
Usually Apple issues updates to their beta system software across all Apple platforms at the same time, but currently macOS 10.13.4 beta 6 has not been released yet.