[OpenSIPS-Users] Intro: Callmar - iOS SIP client with on-device transcription

GameWork Studio gameworkapp at gmail.com
Mon Aug 24 15:12:18 UTC 2026


Hello all,

I'm the developer of Callmar, an iOS SIP softphone that does on-device
speech-to-text transcription of calls (no audio sent to a cloud STT
service). My own testing so far has been against Asterisk; I have not yet
run it against OpenSIPS, so I'm joining this list to learn from people who
do, and to hear about interop issues worth handling on the client side.

Disclosure: Callmar is a commercial product (paid app from my one-person
shop), so please treat this as an interested-vendor introduction rather
than a neutral one. I'm not looking to advertise on-list; I'll keep future
posts to technical SIP questions and answers.

Links, for context:
https://apps.apple.com/app/callmar-sip-phone-transcript/id6764681515
https://callmar.online

Happy to answer questions about the client side, and grateful for any
pointers on OpenSIPS-specific behaviour I should test against.

Thanks,
sip_cm
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