One model. Your words, your Mac, your call
Echo Flow polishes and rewrites locally on your Mac — no cloud, no account, no data leaves your machine. After a one-time setup, the same local model handles everyday polish and every rewrite action.
Echo Flow AI
A single purpose-built local polish model, fine-tuned on tens of thousands of voice-dictation transcript pairs. Trained to fix fill words, false starts, and punctuation without rewriting what you said.
- ✓Fits any Apple Silicon Mac with 4 GB RAM, including base M1 and M2 with 8 GB unified memory
- ✓~380 MB one-time download, then fully offline, never re-downloads
- ✓Fast first-token response, warm-path polish in roughly 150 ms after the first decode
- ✓Preserves your content, names, numbers, URLs, code identifiers, and quotes stay intact
macOS 26+ Apple Silicon
Apple Intelligence handles polish by default; Echo Flow AI remains available as a fallback.
macOS 15 Apple Silicon
Echo Flow AI is the default.
Intel Macs / no AI available
Rule-based polishing fallback ships with the app, no download needed. Switch any time in Settings.
Trained on real dictation, not chat data
Most language models are trained on web text and chat. Echo Flow AI is fine-tuned on tens of thousands of voice-dictation transcript pairs, the kind of run-on, filler-heavy speech people actually dictate.
How Echo Flow picks the right engine
Echo Flow checks what your Mac supports and picks the right engine for you. You don't choose a model; you choose the level of polish, and Echo Flow handles the rest.
| Engine | Where it runs | Default on | Best for |
|---|---|---|---|
| Apple Intelligence | On-device (Apple framework) | macOS 26+ Apple Silicon | Zero setup, already on your Mac |
| Echo Flow AI | On-device after one-time setup | macOS 15 Apple Silicon | Everyday polish and all rewrite actions on any Apple Silicon Mac |
| Rule-based (safety net) | On-device (no model) | Intel Macs, or when AI is unavailable | Automatic fallback when no AI provider is available, not user-selectable |
Frequently asked questions
Does Echo Flow AI run offline?
Is anything uploaded to a server?
Can I switch providers?
What if Echo Flow AI can't run on my Mac?
How big is the Echo Flow AI download?
Is the model included in the DMG?
Watch it polish your own sentences
14-day free trial. Rewrite palette stays free after trial. No account, no subscription for the AI model itself.
macOS 15+ · Apple Silicon recommended · ~135 MB download