iOS 11

1. Hold down app icon until all apps start to shake. 2. Let go of app, then begin to hold home button to start Siri. 3. Immediately after starting to hold home button, move the app around at the same time. Drop the app while Siri is running, and the app will disappear.

Demo on YouTube:

 iOS 10

1. Put your app on screen 2. Make sure screen 1 and buttom dock are completely full of apps. 2. Drag your app from screen 2 to screen 1, and hold on top of another app (do not let go). 3. When “folder” appears, drag app down to bottom-center of the dock, then let go

Demo on youtube: