Kitesurf Instructor: Intermediate (KI) is the original kiteboarding instruction app for Android.KI Intermediate Features: Backrolls, Backrolls w/ Grab, Backroll Inverts, Frontrolls, Frontrolls w/ Grab, Frontroll Inverts, Downloop Transitions, Double Backrolls, Double Frontrolls, Board-Offs, Riding Blind, and much more.