was a third-party application marketplace popular around 2013-2015 that allowed iPhone and iPad users to install apps without jailbreaking their devices. It primarily operated as a Chinese-language platform, often requiring a VPN or specific web links like iphone.kuaiyong.com to function outside of China. Key Features and Historical Use
Some versions of the software also used a shared Apple ID to "purchase" apps once and then distribute them to thousands of users simultaneously. Key Features (Historical) iphone kuaiyong