Built and shipped a full iOS habit-tracking app in SwiftUI, available on the App Store. Designed around Apple's native design language: Naturally clean, minimal, and intuitive. Implemented support for good and bad habit types with daily, weekly, and monthly goal tracking, along with progress and detail views. Migrated local persistence from UserDefaults to more robust storage: SwiftData, establishing a single source of truth for app state. This project has been an ongoing exercise in refactoring and code quality to put out a polished product.