Build a Fully On-Device Voice ChatGPT for iOS with Apple's Free Models

amos_gyamfi · x · 2026-09-03

Developer Amos Gyamfi shares a fully local, on-device iOS AI assistant stack: text generation via Apple Intelligence's Foundation Models, speech-to-text via the SpeechAnalyzer and SpeechTranscriber models, and voice output via the 82M-parameter open-source Kokoro TTS.

All three stages — speech recognition, text generation, and speech synthesis — run offline on-device with no cloud API required. Links to try it out are included.

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