CoinTrack

CoinTrack is a simple cryptocurrency market and portfolio tracker built with Kotlin and Jetpack Compose.

Features

• Cryptocurrency market tracking with INR prices where supported by the API
• Local search by coin name or symbol
• Coin details with current price, 24-hour change, market cap, logo, and a simple price chart
• Persistent watchlist
• Local portfolio holdings with invested value, current value, profit/loss, and return percentage
• Offline cache for the latest loaded market data

Tech Stack

• Kotlin
• Jetpack Compose
• MVVM
• Clean Architecture
• Retrofit
• Room
• Hilt
• Coroutines and Flow
• Coil
• CoinPaprika API
• JUnit

Architecture

Compose UI
    -> ViewModel
    -> Use Cases
    -> Repository
       -> API
       -> Room

The app keeps UI state in ViewModels, business operations in use cases, and data access behind repository interfaces. Room stores cached market coins, watchlist coins, and portfolio holdings.

Future Improvements

• More detailed charts when a richer API plan is available
• Editable portfolio holdings
• Sorting options for market and watchlist screens
• Better coin image coverage if the market endpoint exposes logos directly