Mobile Development

iOS Development

Native applications built with Swift and SwiftUI

Platform iOS / iPadOS
Language Swift 6
Framework SwiftUI

Summary

  • Privacy-first iOS app for hermit crab care tracking.
  • SwiftUI app with Swift 6 concurrency and testable architecture.
  • On-device data, local notifications, and export tools.

CrabApp

Figure CrabApp keeps tank logs, reminders, and export on the phone. Nothing leaves the device.

Hermit Crab Care Companion

A privacy-focused iOS app for tracking hermit crab care: water quality, humidity, temperature, food, health observations, and molting cycles. All data stays on-device—no accounts, no servers, no analytics.

Features

  • Care Tracking

    Log water changes, humidity readings, temperature, feeding, and health observations

  • Local Notifications

    Reminders for care tasks, all created and managed on-device

  • Multi-Tank Support

    Track multiple habitats with separate logs and settings

  • Care trends

    On-device charts of water, humidity, and feeding over time

  • Privacy First

    No accounts, no servers, no telemetry—data never leaves your device

  • Data Export

    Export your data for backup or analysis; import to restore

Technical Highlights

  • Swift 6 Concurrency: Modern async/await patterns with concurrency-safe architecture. Environment injection via @Environment(\.tankStore) follows Swift 6 best practices.
  • Testable Architecture: Dependency injection for all external interfaces (UserDefaults, notifications). Unit tests never touch real user data.
  • CI/CD Pipeline: GitHub Actions for linting (SwiftLint strict), unit tests, and nightly UI tests. Pre-commit hooks enforce formatting.
  • Toast System: Decoupled UI feedback via protocol (Toasting) to avoid runtime selectors and cross-actor captures.
  • Component Library: Reusable SwiftUI components for log history, entry rows, quick-fill chips, tags, and flow layouts.

Privacy & Security

  • Local Storage Only: All data stored in UserDefaults on device
  • No Analytics: Zero telemetry, tracking, or third-party SDKs
  • Clipboard Safety: Local-only with short expiration for clipboard actions
  • Reset Option: Clear all data and notifications from Settings → Advanced

Development Stack

UI Frameworks

SwiftUI UIKit (bridged) Combine

Data & Storage

UserDefaults Codable JSON Export

Quality & CI

SwiftLint SwiftFormat XCTest GitHub Actions

Links

  • GitHub repository — private
  • App Store — coming soon