Ios 15 can play plants vs. zombies 1. According to relevant public information, you can download Plants vs Zombies 1 and play Plants vs Zombies 1 by switching the application store of ios 15 to the international version. IOS is a mobile operating system developed by Apple. Apple announced this system for the first time at Macworld conference on June 9, 2007. Originally designed for iPhone, it was later applied to iPodtouch, iPad, AppleTV and other products. IOS, like Apple's MacOSX, is a commercial operating system similar to Unix. Originally this system was called iPhoneOS. Because iPad, iPhone and iPodtouch all use iPhoneOS, it was announced at the 20 10WWDC conference that it was renamed as iOS(iOS is a registered trademark of Cisco's network equipment operating system in the United States, and Apple's renaming has been authorized by Cisco).