The phrase indicates a minimum operating system version needed for an application or feature to function correctly on Apple mobile devices. For example, an app described as needing this denotes it will not install or operate as designed on iPhones or iPads running older versions of iOS, such as 15.x or earlier.
Adherence to this operating system requirement ensures access to the latest security updates, performance enhancements, and Application Programming Interfaces (APIs). Developers leverage these advancements to create more robust, feature-rich, and secure applications. Consequently, users benefit from improved functionality and protection against vulnerabilities, contributing to a better user experience. This necessity reflects the ongoing evolution of mobile technology and the need for applications to adapt and utilize newer system capabilities.