If you want to swipe up or down on an app to activate it, you can do so with your thumb or index finger.
Swiping left on a swipe-down swipe gesture works like a double-tap to dismiss an app.
But, when you swipe right, the app appears in a new window on the top left corner.
You can tap it to activate that app.
You may also tap the Home button to close that app, or you can tap the Settings button to remove that app from the list.
This new swipe gesture lets you dismiss an application with a single tap, and it works the same way as a double tap.
In iOS 8.3, Apple introduced the swiping gesture.
It allows you to swipe right from an app shortcut on your home screen to dismiss the app.
Swipe right on an application shortcut.
Swip right from the Home screen shortcut.
Swipe left from the shortcut to dismiss that app on the Home Screen.
Swiping right from Home.
Swivel right from your Home screen.
Swivel left from your home app shortcut to the shortcut you want.
Swiped right from shortcut.
If you swipe left on an shortcut and tap it, the shortcut disappears.
Swiper no swipe to dismiss.
If a shortcut is open, but not being used, swipe left from that shortcut.
In iOS 9.1, the swipe gestures for dismiss apps have been simplified.
You no longer need to swipe from Home to dismiss a shortcut.
Instead, swipe right to dismiss it.
Swipes left and right on the shortcut, and swipe up and down on the app to dismiss its shortcut.
You still need to use your thumb and index finger to swipe down.