Touch and hold an empty area on the Home Screen until the apps jiggle
Tap the Add button
Scroll or search for the widget you want
Tap the widget
Swipe to choose a size if available
Tap Add Widget
Drag the widget to the desired spot
Tap Done
Touch and hold a widget to edit it
Tap Edit Widget to change its settings
Touch and hold the Home Screen to move or remove widgets
Tap the minus sign on a widget to delete it
Tap Remove to confirm