The aim of this paper is the development and a detailed overview of a mobile application designed for a Point of Sale (POS) device that can generate and print coupon vouchers. In this context, voucher represents a note for a specific amount of money that is then redeemable. In the case of this application, it is a product of the fintech company Aircash, within whose framework the idea for this paper emerged during a student internship. The application is developed for the Android operating system using the Kotlin programming language in combination with Jetpack Compose for building the graphical interface. Compose eliminates XML and represents a more intuitive way of constructing the user interface through special functions written within Kotlin classes, increasing the simplicity of code writing. The reason for this choice is to become acquainted with modern solutions that could quickly become the primary tools for mobile development. Data retrieval for vouchers and server communication are carried out via an API, with the main functionality being the display, selection, and printing of vouchers. This involves a standard receipt printer integrated into the POS system. The application which is to be adapted for a POS device regardless of the operating system, needs to be user-friendly, concise, and welloptimized in terms of performance, this particularly applies for an application that utilizes Compose. Throughout the paper, the technologies, concepts, and architecture for developing an application that meets the mentioned requirements are described.