Yak - AI SIP Phone

YakPhone — SIP Softphone with On-Device AI

Full-featured SIP client for iOS. Works with any SIP server — Asterisk, FreePBX, FreeSwitch, 3CX, and more.

SIP & CALLING • UDP, TCP, and TLS registration with multiple accounts • G.722 wideband audio; H.264 and VP8 video calls with picture-in-picture • Audio codecs: Opus, G.711 (PCMU/PCMA), G.722, AMR-NB, AMR-WB • Echo cancellation, automatic gain control, noise reduction, and jitter buffer built in • Front/back camera flip during video calls; DTMF keypad for IVR navigation • Native CallKit integration — incoming calls appear as standard system calls • PushKit VoIP push — self-hosted PBX can trigger wake-on-call and missed call alerts • Auto-answer — accept incoming calls automatically after a configurable delay • Call forwarding — redirect unanswered calls to any SIP address or number

SECURITY & NETWORK • Media encryption: DTLS-SRTP, SDES, ZRTP • TLS transport with custom certificate support for SIP signaling • STUN / TURN support for NAT traversal • HMAC-SHA256 authentication for push relay

ON-DEVICE AI • Download Whisper models (Q4 quantized) directly in-app • Real-time call transcription — runs entirely on-device • LLM-powered call summary and analysis — ask about recent calls • No audio or transcripts ever uploaded

MANAGEMENT & LOGS • iCloud backup for accounts and contacts • SIP log viewer with filtering and export • Local HTTP server — remotely configure or query the app over Wi-Fi (Pro) • CLI mode — send JSON commands via TCP to control baresip in real time (Pro) • Custom SIP User-Agent string

MULTILINGUAL • English, 简体中文, 繁體中文, 日本語, 한국어, Français, Español, Русский

Pro features unlock with a one-time purchase — no subscription.

YakPhone requires a SIP account from your own provider or PBX. It is not a standalone phone service.