Eminlin
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- Sep 18, 2026
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Hi all,
Long-time reader of this site. The wiki and the post list archives here have been genuinely useful to us over the years.
Yak Phone is a SIP softphone for iOS, built on open source project baresip. It works with any SIP server - Asterisk, FreePBX, FreeSWITCH, 3CX, Kamailio, or your own PBX.
On the interface side, we kept it deliberately simple. The layout follows the stock iOS phone app, so there is not much to learn - dialing, answering, muting, DTMF all work the way you would expect on an iPhone.
Website: https://app.yakteam.com/
App Store: https://apps.apple.com/us/app/yak-ai-sip-phone/id6763033863
What it does:
SIP and calling
- UDP, TCP, TLS registration, multiple accounts, automatic re-registration after network changes
- CallKit integration, incoming calls show up as normal iOS calls
- PushKit VoIP push, no background keep-alive needed. The app does not need to stay running in the background - even after it is fully killed, your own PBX can trigger a push to wake it for incoming calls and missed call alerts
- Video calls (H.264, VP8) with picture-in-picture, camera flip during a call
- Codecs: Opus, G.722, G.711 (PCMU/PCMA), G.729, GSM, iLBC, AMR-NB/WB
- Echo cancellation, AGC, noise reduction, jitter buffer
- DTMF, blind and attended transfer, call forwarding, per-account auto-answer and caller ID
Security and network
- DTLS-SRTP, SDES, ZRTP
- TLS with custom CA and client certificates
- STUN/TURN/ICE, outbound proxy
On-device AI
- Call transcription using Whisper models downloaded in the app
- Call summaries and Q&A about recent calls, done by a local LLM
- All of it runs on the phone. No API key, no server, nothing uploaded
Management
- iCloud backup for accounts, contacts, calls, messages
- SIP log viewer with filtering and export
- Local HTTP server on the device for remote configuration
- CLI mode, JSON commands over TCP to control baresip
- Custom User-Agent string
The app is free. Pro features (push relay, HTTP server, CLI) are a one-time purchase, no subscription. You need your own SIP account or PBX, it is not a standalone phone service.
Promo codes for the full Pro unlock:
M7RANA67NJPXLYKPK7
78YEL6H3HTXKAXE3PM
W4PMJNFTWTKFXERNRJ
W3R6RJW88EYYW7AYHH
XJW6FLX7YM6PKRN6RY
Redeem in the App Store app under your profile. If one is taken, please reply so others know.
Feedback welcome. If you run it against your own setup and something breaks, I'd like to hear about it. Suggestions for what would make it more useful day to day are also appreciated. Hope you like it
Thanks,
Emin
Long-time reader of this site. The wiki and the post list archives here have been genuinely useful to us over the years.
Yak Phone is a SIP softphone for iOS, built on open source project baresip. It works with any SIP server - Asterisk, FreePBX, FreeSWITCH, 3CX, Kamailio, or your own PBX.
On the interface side, we kept it deliberately simple. The layout follows the stock iOS phone app, so there is not much to learn - dialing, answering, muting, DTMF all work the way you would expect on an iPhone.
Website: https://app.yakteam.com/
App Store: https://apps.apple.com/us/app/yak-ai-sip-phone/id6763033863
What it does:
SIP and calling
- UDP, TCP, TLS registration, multiple accounts, automatic re-registration after network changes
- CallKit integration, incoming calls show up as normal iOS calls
- PushKit VoIP push, no background keep-alive needed. The app does not need to stay running in the background - even after it is fully killed, your own PBX can trigger a push to wake it for incoming calls and missed call alerts
- Video calls (H.264, VP8) with picture-in-picture, camera flip during a call
- Codecs: Opus, G.722, G.711 (PCMU/PCMA), G.729, GSM, iLBC, AMR-NB/WB
- Echo cancellation, AGC, noise reduction, jitter buffer
- DTMF, blind and attended transfer, call forwarding, per-account auto-answer and caller ID
Security and network
- DTLS-SRTP, SDES, ZRTP
- TLS with custom CA and client certificates
- STUN/TURN/ICE, outbound proxy
On-device AI
- Call transcription using Whisper models downloaded in the app
- Call summaries and Q&A about recent calls, done by a local LLM
- All of it runs on the phone. No API key, no server, nothing uploaded
Management
- iCloud backup for accounts, contacts, calls, messages
- SIP log viewer with filtering and export
- Local HTTP server on the device for remote configuration
- CLI mode, JSON commands over TCP to control baresip
- Custom User-Agent string
The app is free. Pro features (push relay, HTTP server, CLI) are a one-time purchase, no subscription. You need your own SIP account or PBX, it is not a standalone phone service.
Promo codes for the full Pro unlock:
M7RANA67NJPXLYKPK7
78YEL6H3HTXKAXE3PM
W4PMJNFTWTKFXERNRJ
W3R6RJW88EYYW7AYHH
XJW6FLX7YM6PKRN6RY
Redeem in the App Store app under your profile. If one is taken, please reply so others know.
Feedback welcome. If you run it against your own setup and something breaks, I'd like to hear about it. Suggestions for what would make it more useful day to day are also appreciated. Hope you like it
Thanks,
Emin
Phone System 