The Pocket-Pro Winter App, Pocket Pro HL400-W, gives users access to timekeeping functions dedicated to the timing of winter sports. The innovative and bespoke application makes it possible to time training sessions for winter events with individual starts and finishes, mass start and individual finishes (ski cross, boarder cross, ...) and also allows users to time several competitors racing at the same time. All times are memorized and can be recalled and visualized for each competitor.