A very easy to use calculator for range owners, course managers and target setters to calculate how many boxes of targets needed for an event. Simply enter the number of competitors, number of targets in competition, number of traps on the course, and a percentage for show and broken targets. The app will calculate how many boxes of targets- standard, midi, battue, rabbit and minis are required at each trap. Calculations based on current count per box of White Flyer targets. App will calculate number of boxes needed for sporting, super sporting, FITASC, 5-Stand, or small gauge events.