InternalUI Builds

This is a list of known internal UI builds. Unlike Factory Firmware. These builds have UI, like normal iOS builds.

What Internal UI builds Are
Internal UI builds are iOS, watchOS, iPadOS and tvOS builds that have features that aren't in normal builds. These builds are for internal use within apple and may be found on Prototypes. Internal UI builds often have experimental features and internal apps. You can learn more about internal apps in this link --> Apple Internal Apps.

Screenshots from internalUI builds
This is the list of known internal UI builds.