Closing apps on an iPhone 13 is a simple process that can help you conserve battery life and optimize your device’s performance. Here are the steps to follow:

  1. Swipe up from the bottom of the screen and pause in the middle of the screen until the App Switcher appears.
  2. Swipe left or right to navigate through the open apps.
  3. Swipe up on an app preview to close the app.

Alternatively, you can follow these steps:

  1. Double-click the Home button to open the App Switcher.
  2. Swipe up on an app preview to close the app.

Keep in mind that closing apps isn’t always necessary, as iOS is designed to manage memory and resource usage effectively. However, if you notice that an app is not responding or behaving erratically, closing it may help resolve the issue. Additionally, some apps may continue to run in the background and consume battery life even when not in use, so closing them can help conserve battery life.