IPhone can use the third-party application screensaver clock in the App Store to set the clock as a screensaver.

1. Unlock iPhone to the home screen page. As shown in the figure.

2. Find and open the app store that comes with your phone. As shown in the figure.

3. After searching for "Clock Lock Screen" in the App Store, select any third-party application for installation. The following is an example of a "screensaver clock". As shown in the figure.

4. Press the HOME button to return to the main screen page and turn on the downloaded and installed application screen saver clock. As shown in the figure.

5. After entering the application screen saver clock, select the gear setting in the lower right corner. As shown in the figure.

6. In the screen saver clock setting interface, select and set it as the screen saver version. As shown in the figure.

7. Apple successfully set the clock as a screen saver. As shown in the figure.