I build AI tools that let you talk, listen, and get things done — across iPhone, Mac, and the cloud.
A voice-first AI workspace for iPhone and Mac. Press and hold to speak naturally — your AI assistant responds instantly by voice in your chosen language. Adaptive modes for daily chat, meetings, study, and entertainment. Premium TTS voices powered by Alibaba Cloud CosyVoice, OpenAI, Minimax, and ByteDance Volcano Engine.
Learn more →The backend powering Sayi's managed service tier. Handles user auth, API key proxying, and secure relay to Alibaba Cloud DashScope. Your users get AI without ever touching a private key.
saiyi.app →New AI-powered tools are always in the pipeline. Stay tuned for smart productivity apps that put voice and intelligence at the center.
Stay updated →I'm a solo developer focused on building voice-first AI products. My philosophy is simple: your voice is the fastest input you have, so your tools should listen.
Based in Hong Kong, I design and develop end-to-end — from the Swift client on your iPhone to the cloud backend that powers it. Every product is crafted to feel natural, fast, and private.
My tech stack spans iOS/macOS (Swift, SwiftUI), cloud infrastructure (FastAPI, PostgreSQL, Redis), and AI integration (Alibaba Cloud, OpenAI, ByteDance, Minimax).
Interested in collaboration, have feedback, or just want to say hi?