imjaDNS is a SwiftUI-based iOS application that allows users to view, manage, and apply custom DNS profiles system-wide using Apple's NEDNSSettingsManager. It loads default profiles from Firebase Remote Config and supports user-defined DNS servers with persistent storage.
- ✅ View currently active system DNS
- 🌐 Detect current network (Wi-Fi, Cellular, Ethernet)
- 📥 Fetch curated DNS profiles from Firebase Remote Config
- ➕ Add your own custom DNS profiles (persisted locally)
- 🔁 Auto-apply last used DNS at app launch
- ⚙️ First-time setup alert with shortcut to DNS settings
- 🧩 Built with SwiftUI + Composable Architecture (TCA)
🧠 Architecture
• Composable Architecture (TCA): State management and effects.
• SwiftUI: UI framework for views.
• Firebase Remote Config: Remote profile loading.
• UserDefaults: Stores last used DNS and custom profiles.
• NEDNSSettingsManager: Applies system-wide DNS settings (no VPN used).
🛠 Developer Notes
• DNS changes require user interaction: Users must go to Settings > VPN & Device Management > DNS and select imjaDNS.
• Custom profiles are stored using UserDefaults and restored on every launch.
• Remote Config profiles load only once per session to minimize bandwidth and server hits.
📄 License