iScroll is the first Text Synchronized Audio (TSA) application developed for smart phones. It's a combination of both an e-book and audiobook that provides smart phone users a way to listen, read and learn on the go. iScroll is an application created by appSessions, a Maryland-based firm founded in 2008 that designs and develops applications for smart phones and iPhones. The terms iScroller often refers to a person that is using the iScroll application. Similarly the term iScrolling refers to the act of using the iScroll application.