This is the final build of the iOS 13.4 prior to its release to the public. The iOS and iPadOS 13.4 is expected to bring a number of interesting features to the Apple devices. First off, there is a new toolbar in the Mail app which is expected to have an improved layout after complaints about the Mail app in earlier versions of the iOS 13.

This new design has created more space between the delete and reply icons, making it unlikely to accidentally delete an important email. It also includes the Compose and Folder icons. The iOS 13.4 will also include iCloud Folder Sharing, which will let users share folders with other people. Apple has also added a number of new Memoji and Animoji stickers in this update. Another eagerly anticipated feature in this update is the introduction of mouse and trackpad support for the iPad Pro, which was earlier confirmed by Apple. The golden master versions also suggest that we may be seeing a CarKey API, which was reported in an earlier article but has not been officially confirmed by Apple. The new iOS and iPadOS 13.4 can be installed from the Apple Developer center or can be gotten over the air once the proper developer profile has been installed.   References

Apple Releases Golden Master Of iOS and iPadOS 13 4  With Trackpad Support   MobilityArena - 76