SIP Telephone

SIP Telephone is a professional SIP softphone for developers, system administrators, support teams, and advanced users. It is available for iPhone and Mac.
Connect your own SIP service to configure accounts, make voice calls, inspect signaling, diagnose audio, and monitor call quality. It is designed for everyday calling, system integration, testing, and troubleshooting.
Key Features
• Multiple SIP Accounts
Add, edit, enable, or disable multiple SIP accounts and quickly switch between frequently used lines.
• Complete Call Controls
Make and answer calls, hang up, hold and resume, mute audio, and send DTMF tones.
• SIP Signaling Inspection
Review REGISTER, INVITE, and other SIP messages, transaction timelines, and raw packets to diagnose registration and call issues.
• Real-Time Status and Quality Monitoring
View registration status, server and transport information, ICE connection state, packet loss, latency, and audio levels.
• Audio Diagnostics
Discover available microphones and speakers, switch devices, run microphone loopback tests, and verify speaker output.
• Call History
Review call direction, time, duration, and status, with support for quick redial and history management.
• ICE, STUN, and TURN Testing
Test ICE server connectivity and candidate discovery to troubleshoot WebRTC media connections.
• Pro Account Sync
With a one-time Pro purchase, sync SIP accounts across your Apple devices through iCloud, or import and update accounts using subscription links and QR codes.
Privacy and Security
SIP passwords and sensitive credentials are stored in the system Keychain. iCloud sync is enabled only when requested by the user, and account data remains within the user’s Apple ID ecosystem. Camera access is used only to scan account subscription QR codes.
Important
This app is a SIP client only. It does not provide SIP accounts, phone numbers, carrier service, calling plans, or emergency calling. A compatible SIP service supplied by you or a third-party provider is required. Call quality, pricing, and service availability are determined by the configured SIP provider.