Which iOS device uses the swipe-up method to force close an app?

The iPhone X and later models, including the iPhone 11 and newer, utilize the swipe-up method for multitasking and force closing apps. This method involves swiping up from the bottom edge of the screen and then pausing to view the app switcher. From the app switcher, users can swipe up on any app to force it to close.

This gesture was introduced with the iPhone X, which removed the physical home button that previous iPhone models used to access the app switcher and force close applications. In contrast, the iPhone 8 Plus and earlier models, such as the iPhone 7, require a different method that involves double-clicking the home button to access the app switcher. The iPad Pro also shares similar functionality with the iPhone X design, utilizing swipe-up gestures when it operates on newer versions of iOS, but the main differentiation is centering around the introduction of the swipe-up method specifically with the iPhone X.

Thus, the iPhone X is indeed the device that employs the swipe-up method to manage apps effectively.