IOS 13 is a mobile phone operating system developed by Apple, which was released on June 4th, 20/KLOC-0, Beijing time.

IOS 13 improves the speed of face ID recognition. And by improving the packaging method of App Store applications, the scale of app occupation is reduced. IOS 13 App starts twice as fast as iOS 12. IOS 13 also introduced new functions such as dark mode and privacy protection.

As of September 2, 2020, iOS 13 has been updated to iOS 13.7, and all versions of iOS 13 have been updated.

IOS 13 supports dark mode, and various applications can switch a variety of dark color schemes. Dark mode is suitable for use in low light environment, which can make users' eyes more comfortable. The dark mode support is set to be turned on and off at a specific time or according to sunrise and sunset, which is convenient for users to use their mobile phones at a specific time. The wallpaper built in the system is optimized for dark mode, and the wallpaper can change automatically with the user switching between dark mode and light mode. Third-party developer pages can use the provided API to use dark mode in their own developed applications.