iPhone 8 or earlier

1. Double-click the Home button to show your most recently uses apps. 
2. Swipe right or left to find the app that you want to close.  
3. Swipe up on the app's preview to close the app. 

iPhone X or newer

1. From the Home screen, swipe up and pause.
2. Firmly touch and hold the app, then tap . You can also swipe up to close the app as soon as you see .

For more information about switching apps on your iOS device, visit Apple Support.