What is "pull-to-refresh"

Pull-to-refresh is a touchscreen gesture that consists of touching the screen of a computing device with a finger or pressing a button on a pointing device, dragging the screen downward with the finger or pointing device, and then releasing it, as a signal to the application to refresh the contents of the screen.

The pull-to-refresh gesture first appeared in the Tweetie mobile application developed by Loren Brichter. Brichter developed Tweetie, an iOS application for Twitter, as a personal project in 2008 after he quit his job at Apple Inc. in 2007.