Sumi

什麼是 Sumi？

You talk, Sumi types — but not what you actually said. It cleans up filler words and grammar, then adjusts tone for whatever app you're in. Gmail gets a professional version, Slack gets something short. Meeting mode records calls in the background. Edit by voice: select text, say what to change. 100+ languages. Runs on your machine. Free, GPLv3. macOS + Windows.