The designation refers to a pre-release iteration of Apple’s mobile operating system. Specifically, it denotes the third beta version of what is expected to be iOS 18.4. Beta versions allow developers and public testers to evaluate and refine the software before its official public release. These pre-release builds often contain new features, bug fixes, and performance improvements that are not yet available to the general user base.
These builds are crucial in the software development lifecycle. They allow for real-world testing across a variety of devices and user scenarios, identifying potential issues that may not be apparent during internal testing. This process aids in creating a more stable and reliable final product for end-users, enhancing user experience and overall system functionality. The numbering convention (18.4 beta3) indicates it builds upon previous iterations, both public and internal, incorporating feedback and improvements continuously.