I developed ExRevHive, an Android application to track revenues and expenses, using Jetpack Compose and the MVVM architecture. It includes authentication, data management, and persistence with strong focus on Object-Oriented programming (OOP) and testing.

Key Features:

• User authentication with session persistence (login state saved via SharedPreferences)

• Full transaction management: add, edit, delete, and view revenues and expenses

• Transaction filtering by type (Expense or Revenue)

• Categorization of transactions (Food, Transport, Housing, etc) using enums

• Data persistence with JSON serialization via Gson

• Seamless navigation across multiple screens (Login, Home, Transaction List, Transaction Details)

• Unit testing with Junit and Mockito for business logic validation

• Modern, responsive UI built with Jetpack Compose and ViewModel architecture

This project allowed me to practice clean architecture, efficient state management, local storage solutions, and test-driven development within the Android ecosystem.