Multiplatformní mobilní aplikace pro hudebníky na správu písniček s akordy

This thesis focuses on the design and development of a mobile application for managing and displaying chord-based songs, intended primarily for less experienced amateur musicians performing live. The aim of the thesis was to propose and implement a solution that simplifies repertoire management for musicians. The application is designed to support both the preparation phase—such as searching, creating, and editing songs and organizing them into playlists—and the live performance itself. Musicians can have all necessary songs clearly accessible in one place and can easily choose a key transposition or adjust which song information is displayed on the screen. The solution also includes playlist sharing between users, enabling easier collaboration within music groups. In the introductory part, an analysis of existing applications with similar purposes was carried out, along with an identification of their limitations, which served as the basis for defining requirements for the proposed solution. This was followed by the design of the architecture, user interface, and database model. Development proceeded iteratively, following agile principles. The user-facing part of the application was built using the React Native framework together with the Expo platform for mobile app development, while the server-side component was implemented using Node.js, Express.js, and MongoDB. The application was continuously tested and evaluated based on user feedback. The final outcome is a functional mobile application for Android and iOS platforms that can serve as a practical and well-organized tool for working with musical repertoires.