Because Android is an open source system and Apple is a closed source system. Android can download apps outside of the mall, while Apple must download apps in the app store or with a corporate signature certificate. Blue Cat Video can't pass the Apple mall's audit and can't get a corporate signature certificate, so it can't be downloaded because it doesn't have one.

iOS is a mobile operating system developed by Apple. First announced at Macworld on January 9, 2007, it was originally designed for use on the iPhone, and has since been applied to the iPod touch and iPad. iOS is a Unix-like commercial operating system, like Apple's macOS.

Originally, the system was called iPhone OS, because iPad, iPhone, and iPod touch all use iPhone OS, so it was announced at WWDC 2010 that it would be renamed iOS (iOS is a registered trademark of Cisco Networking Operating System, and Apple's renaming has been authorized by Cisco). Cisco's authorization).

Enterprise software

Enterprise third-party software has been available to run on the iPhone since iOS version 1.0. However, this software is at risk of being completely broken by any iOS update, although Apple has stated that it will not design a system update specifically to break this third-party software.

The way these third-party apps are distributed is through the Apple Developer Enterprise Program, which is Apple's official way of distributing them to businesses for use in things like enterprise management. These apps will not be available in the App Store? .