Phonos SIP Client

A beautiful, open-source desktop SIP client built with Flutter for Windows, macOS, and Linux.

Screenshots

Features

• Cross-Platform: Windows (x64), macOS (Universal), Linux (x64).
• SIP & WebRTC: Supports WebSocket (WS/WSS), TCP, and SRTP voice/video calls.
• Video Calls: Integrated video call support with Picture-in-Picture.
• Modern UI: Clean Material Design 3 interface.
• Codecs: Configurable preferred codecs (Opus, G722, PCMA, PCMU).

Motivation

I couldn't find a good SIP desktop client app.

Getting Started

1. Clone: git clone <repo>
2. Install: flutter pub get
3. Run: flutter run -d macos (or windows/linux)

License

GNU GPLv3 License.