Juno - Free, local AI powered Voice to Text w/ live transcriptions
by•
Juno is a local, open-source voice writing app for Mac. It is the only voice dictation tool with live transcriptions.
Speak naturally in Mail, Slack, Notes, Cursor, or the app you’re already using; Juno writes clean text, rewrites selected passages, uses snippets, and creates Notes, Reminders, and Alarms. No login, runs offline and free forever.
Replies
TinyCommand
how to train this model on my local system? when i make corrections in the transcript does it learn? I have tried similar tools in the past, but I was not successfully able to train them. Like the words that I wanted in its vocabulary, I was just not able to get it to learn them. How does Juno solve this problem?
Juno
@priyanka_gosai1 Great question. You don’t have to train the base model manually. Juno solves this with a local memory + dictionary layer on top of the ASR.
You can explicitly add words, names, acronyms, product terms, aliases, and pronunciation hints to your dictionary. You can also create snippets, like “my signoff” → a full signature, or app-specific terms for work/code/docs.
When you correct a transcript, Juno stores the raw ASR → corrected text pair locally, with safety checks so random mishears don’t pollute memory. Repeated corrections can promote into your vocabulary automatically.
On the next dictation, Juno ranks your dictionary, corrections, snippets, screen context, selected text, and current app, then feeds the relevant terms back into ASR biasing, live preview repair, and final transcript cleanup.
Juno
@outofelement Thanks Marat, excited for you to try Juno!
Juno will always be free - speaking is free, and typing shouldn't be paywalled.
To answer your question: I don't plan to monetize this. I use Juno every day, and the roadmap is just making it better and better for my own daily use.
There's no catch. Everything runs 100% locally on your Mac. Since there is no cloud processing, there are no server costs to offset, and your data stays completely private.
The live transcription bit is what sells me — most dictation tools make me wait for the whole block then fix it after. As an indie dev I basically live in Cursor and Notes, so something local + offline that isn't shipping my half-baked specs to a server is a real plus. Does the rewrite-selected-text work inside Cursor's editor too, or just native text fields?
Juno
@lennoxbeflying Yes, Cursor is exactly one of the surfaces we care about.
Rewrite-selected-text is not limited to native text fields. Juno reads the active selection through local Accessibility APIs, sends only that selected span into the local rewrite path, then pastes the result back over the same selection.
For code editors like Cursor/VS Code, we also try to pull editor context like file name, nearby text, and symbol under cursor, so the rewrite is less “generic AI polish” and more aware of the code/doc you’re actually editing.
Would love to see this for Windows and Linux users
Juno
@aymnart Windows, Linux or mobile are not in plans currently.
Juno
@ian_greig Full local compute on iOS is a challenge right now, but I am actively testing lighter models. We might build a streamlined iOS app if there's enough demand - would a simplified mobile version be useful to you?
tried it briefly with reminders/alarms and it's already better than siri. didn't touch the cursor integration yet but planning to try that next time i'm coding. nice work.
Juno
@liam_appbuildchat Thanks alot Liam. Glad you liked it!
As someone who gave up typing a while ago and basically lives in voice notes now, Juno just fits how I already work.
The open source approach is what really excites me. I keep thinking about a future where Juno isn't just an app but infra that a ton of other tools get built on top of.
And the offline mode is the thing that makes it actually unique. It removes all the distraction so you can sit with an idea and cook. That kind of focus is rare.
Juno
@deepansh_singh66 glad you liked it. Try 'Hey Juno', and you'll stop using Siri for those actions on your Mac.
For some reason it freezes when I run the listening
MBP 16 M4 Pro, 24GB ram, should be pretty good to go for it
Juno
@alexandroff_h Hey shouldn't happen. Can you please share the logs with me on hi@cassiniresearch.com, I'll look into it.