Інформаційна система обліку та контролю витрат користувачів в онлайн-сервісах

Abstract

This work describes the development of a mobile application for an information system for tracking and controlling user expenses in online services. The system provides centralized management of subscriptions and one-time purchases, automatic price detection, reminders about upcoming payments, expense analytics by categories, and AI-based recommendations for budget optimization using Google Gemini AI. A hybrid approach is used: algorithm-based analysis is combined with personalized advice from artificial intelligence. The app also includes category filters, export of reports to PDF, support for 11 interface languages and 9 currencies with automatic exchange rate updates. The system is developed using Kotlin, Jetpack Compose, SQLite, and Firebase to ensure offline work and cloud data synchronization.