The Present, a stock recording of case study making data recording in a book. The problem of case study is data recording isn’t system, Difficult to find, Take a long time to cutoff stock and can’t know a stock real time.The attention of independent study was the improvement of stock recording methods by application POS on smart phone: A case study of Gift Shop. This independent study aims at study and analyze a problems working process from warehouse management of case study, Compare with appropriate application POS of warehouse management. By making on the selection application popular, direct or close to the requirement in use. And comparison of efficiency applications with the Blackbox Methods. The result of study application POS appropriate is RangyPOS . But application RangyPOS some of the topic from evaluation of efficiency applications with Blackbox Methods. In terms of the ability of system RangyPOS also efficiency also lower TapPOS is time it takes to data recording, Stability and the speed to touch of system also lower TapPOS. While the application RangyPOS compared with POS (Point of Sale) were more effective than.