Facebook iPhone app
$free

- To re-arrange icons, hold your finger down on an icon until they jiggle. Drag and drop your icons to place them. Tap done when finished to set.

- To add a custom bookmark, tap on the + symbol, search for and select a friend to add his or her profile to your Facebook home screen.

- Notifications appear in a blue bar at the bottom of the app. Tap to access.

- When viewing a profile or other Facebook page, tap the icon in the top-left to go back to your Facebook home screen.