Hold Fn, bring your own key
The best value-for-effort option on a Mac if you are comfortable with cloud inference and can paste an API key.
FreeFlow is a 300-line answer to a $15 subscription: capture on Fn, ship to Groq, paste the result. Because Groq's inference is exceptionally fast, latency lands close to the best commercial products.
It does nothing else — no dictionaries, no rewriting, no offline mode.
Groq's per-minute Whisper pricing, typically a few cents a day for heavy use.