IOS 13

IOS 13 is a previous version of iOS, the operating system of the iPhone and iPod Touch. It was succeeded by IOS 14 on March 26, 2021. 

 Features 
The iOS 13 has a features like dark mode options, new app called "Find My" which is switched by Find My iPhone and Find My Friends, changed contacts icon and many more.

 References 

Other websites

13