Value SpeakLearn English from Buffett and Munger

Value Speak (development codename Alpha Speak) is the first mini-program I built and shipped as one person + AI. It combines English practice with investing wisdom: the material is real quotes from Buffett, Munger and other great investors — for example Buffett's shareholder letters — each with a Chinese translation and its source, organised by theme (such as clean energy). The home screen is called “Your Snowball”: your streak and total days grow like a snowball.

How you practise

1. Listen: hear the model reading first
2. Read: read aloud and record yourself
3. Score: AI scores pronunciation and fluency and gives feedback
4. Chat: a practice conversation with AI around today's sentence

How it was built

• Tools: AI coding tools, WeChat DevTools, Python FastAPI, Doubao LLM, text-to-speech, object storage
• Five steps: define the minimal loop → prepare the English corpus → backend → frontend → deploy and upload

Four pitfalls on the way to launch

1. The server port wasn't open
2. Server login keys
3. AI scoring was too slow: about 40 seconds at first, about 8 seconds after debugging (tested in this project)
4. The WeChat simulator can't record audio — you need a real device

AI writes code fast, but shipping means understanding every pitfall. The full story is in the build video.