Launching today

Megaphone

Launching today

Open-source Mac dictation App that's 100% on-device

64 followers

Open-source Mac dictation App that's 100% on-device

64 followers

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AI Dictation Apps

Hold Fn, speak, and Megaphone types clean text into any Mac app. Apple’s SpeechAnalyzer transcribes as you talk, while on-device Foundation Models remove fillers, fix self-corrections, adapt to app context, and power inline voice commands. No account, API key, subscription, or server. Free, MIT-licensed, and native to Apple silicon Macs running macOS 26.

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Launch tags:Productivity•Artificial Intelligence•GitHub

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Megaphone

Maker

📌

Hey Product Hunt 👋 A few days ago, I was scrolling Hacker News when I came across a benchmark of Apple’s new SpeechAnalyzer API. The results caught me off guard: Apple’s on-device model was more accurate and roughly three times faster than Whisper Small in the benchmark. That made me wonder why so many Mac dictation apps still need subscriptions and cloud-hosted transcription. So I built Megaphone. Hold Fn, speak naturally, and release. Megaphone types clean text directly into whatever app you are using. SpeechAnalyzer processes your audio while you talk, and Apple’s on-device Foundation Models clean up fillers, resolve self-corrections, and fix punctuation before the result lands. A few other things it can do: • Start with “Hey Megaphone” to generate or rewrite text directly at your cursor • Adapt formatting and vocabulary to the active app • Learn names, acronyms, and technical terms in a private Dictionary • Run in multiple languages • Use hold-to-talk, toggle recording, custom shortcuts, and voice macros There is no Megaphone account, API key, subscription, cloud transcription service, or server receiving your recordings. Megaphone is free, MIT-licensed, and built natively in Swift for Apple silicon Macs running macOS 26 Tahoe. It is built on top of Zach Latta’s excellent FreeFlow project. I replaced its cloud transcription stack with Apple’s SpeechAnalyzer and moved the cleanup and intelligence layer onto Apple’s on-device models. I would especially love feedback on three things: 1. Accuracy with names, accents, and technical vocabulary 2. Whether Smart Cleanup changes too much—or not enough 3. Whether Inline AI feels genuinely useful in daily work The source is public, the issue tracker is open, and I am actively maintaining it. Thanks for giving Megaphone a try.

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7d ago

100% on-device is the part that sold me — no cloud round-trip for dictation means it should work fine offline and nothing leaves the machine, which is rare for this category. What's the on-device model you're running for transcription, and how's accuracy holding up against something like Whisper cloud on technical/code-heavy speech? Also curious if it's Swift/native or if you're wrapping something cross-platform under the hood.

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9h ago

Megaphone

Maker

@hi_i_am_mimo SpeechAnalyser API and Apple's on-device foundation model and 100% swift :)

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7h ago

since everything is local with no account or server, what happens to the private Dictionary if you use more than one Mac. does it stay per machine and you re-teach it your names and jargon on each one, or is there some sync path that doesn't involve a cloud account

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9h ago

Megaphone

Maker

@galdayan that's actually a really good suggestion, maybe we can do that wish JSONs

will ship later today
Edit: there's a new import and export dictionary button in v1.1.8 !

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7h ago

Running everything on-device feels like a long-term advantage if the experience is just as good as cloud tools.

Curious—what convinces people to stick with Megaphone after the first week—privacy, speed, or something else?

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7h ago

Megaphone

Maker

@aryan787544 absolutely ! It's likely a mixture of both :) Megaphone is for everyone and Open Source

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6h ago

Megaphone

Maker

Hey folks, adding to launch day excitement, I'm running an agent loop that looks at the best suggestions in the comments and raises PRs to integrate it into the app 🙌

So drop your best ideas that would make Megaphone perfect for you :)
https://github.com/Kuberwastaken/megaphone

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6h ago

Honest question: how is this different/better than Apple‘s own dictation feature in macOS?

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1h ago