Návrh a implementace aplikace pro evidenci posilovacích výkonů s prvky sociální motivace

This bachelor’s thesis focuses on the design and implementation of a mobile application for tracking strength training, intended for iOS and Android platforms. The goal of this thesis was to create a functional application that meets the requirements for full offline availability, optional synchronization with a cloud database, and social features. The application is implemented in the Dart language using the Flutter framework, which allows a single codebase to be shared across both target platforms. Local data storage is provided by the Drift library on top of an encrypted SQLite database. The cloud backend consists of the Supabase platform, which provides a PostgreSQL database, user authentication, and a Row Level Security mechanism. The application’s architecture is based on the offline-first principle, in which the local database is the primary data source and synchronization with remote storage occurs asynchronously via the queue structure. The thesis further describes the design of social features, including a system for adding friends via QR codes, metric calculation, and the display of leaderboards. The result of this thesis is a functional application prototype verified on a physical device running the Android operating system.