PixelCast

Overview

Offline-first weather app integrating the OpenWeatherMap API for reliable forecasts without network access. Strict Clean Architecture and MVVM with reactive data streams over Coroutines and StateFlow, a hand-built 8-bit Jetpack Compose UI library, and lock-screen-breaking alarms via AlarmManager.

Core capabilities

• Room is the single source of truth; the network only refreshes it
• Live weather monitors with scheduled alerts and full-screen alarms (AlarmManager)
• Bespoke pixel-art Compose design system — hand-curated fonts, Lottie and GIF states
• Full Arabic localisation with RTL layouts
• Unit tested across DAO, repository and ViewModel layers (JUnit4 + MockK)

Architecture

Three layers, strictly separated: a data layer wrapping Retrofit and the Room DAO, a domain layer of use cases with no Android imports, and a Compose presentation layer driven by StateFlow. The repository always emits from Room first, then refreshes from OpenWeatherMap, so the UI never waits on the network.

Project facts

Role

Solo — design, engineering, assets, tests

Context

ITI · 2026

Platform

Kotlin