Casussy is a native iOS application for collaborative household management. Designed for families and housemates, it allows organizing daily tasks, shopping lists, weekly meal plans and expense tracking together. The main feature is total sharing: when someone adds a task or completes an item, it's visible to all household members in real-time.

Frontend built with Swift + SwiftUI featuring Glass Morphism design, state management with Combine/async-await, offline persistence with Core Data. Backend API with Hono on Node.js, Neon PostgreSQL database with Drizzle ORM, JWT authentication. Invitation system to add family members, automatic recurring tasks, real-time sync across devices.