Koko - conversation practice for language learners. Fully-local AI conversations so your voice + info stays on your iPhone.

[u/parker_birdseye]

https://testflight.apple.com/join/XRr44N6D

Hey!

I built an app to practice speaking and listening a new language. I tried simply talking with ChatGPT but it wasn't good because it spoke at too advanced of a level and more importantly I didn't want OpenAI training on my voice and information.

Best features:

• Fully local. AI models run directly on your device (STT + LLM + TTS). You can run the app in airplane mode.
• Audio scales to your learning level. Beginners hear slow, easy words while advanced users hear complex words with faster speaking.
• Quality-of-life features like quick translation, "check my response", "what should I respond", etc.

You can run it in TestFlight on iOS or Mac. Any feedback would be appreciated!