Megaphone is an open-source, 100% on-device Mac dictation application designed for Apple silicon Macs running macOS 26. Built by developer Kuber Mehta, it allows users to simply hold the Fn key and speak, instantly typing clean text into any Mac app.

Unlike cloud-based dictation tools, Megaphone leverages Apple's SpeechAnalyzer for real-time transcription while you talk. It then utilizes on-device Foundation Models to automatically clean up your text by removing filler words, fixing self-corrections, adapting to the specific app context, and powering inline voice commands.

With no accounts, API keys, subscriptions, or external servers required, Megaphone ensures complete privacy. It is completely free, open-source under the MIT license, and runs natively on Apple silicon hardware.

Pros of Megaphone

100% on-device processing guarantees complete privacy with no external servers or cloud APIs
Completely free and open-source under the MIT license
Requires no account, registration, subscription, or API keys
Automatically removes fillers, fixes self-corrections, and adapts to app context using on-device Foundation Models
Seamless system integration—just hold the Fn key to dictate into any Mac app

Cons of Megaphone

Limited to Apple silicon Macs running macOS 26
Requires Apple's SpeechAnalyzer and native on-device capabilities
Not available for Windows or non-Apple platforms

Frequently Asked Questions

What is Megaphone?

Megaphone is an open-source, 100% on-device Mac dictation app that lets you hold the Fn key, speak, and have clean text typed directly into any Mac app.