# Megaphone

> Megaphone is a free dictation app for Apple silicon Macs that converts speech to text locally. It processes audio on-device without cloud subscriptions, providing Mac users with private and offline voice typing.

- Type: AI tool
- Page: https://completeaitraining.com/ai-tools/megaphone/
- Published: 2026-07-16
- Updated: 2026-07-24
- Author: Jeroen Erne
- Jobs: Writers, PR and communications, Legal, Healthcare, Education, Executives and strategy
- Topics: Speech-To-Text, Apple iOS Mac, Privacy, Productivity
- Reading time: 1 min

### About Megaphone

Megaphone is a free, open-source dictation app for Mac that runs entirely on-device. It uses Apple's SpeechAnalyzer for transcription and on-device Foundation Models to clean up fillers, self-corrections, and punctuation before typing the result into any text field. The software is MIT-licensed and requires an Apple silicon Mac running macOS 26 Tahoe.

### Review

Megaphone enters the dictation space with a specific focus: keeping all processing local. The app captures audio when you hold the Fn key, then transcribes and refines it using Apple's latest on-device models. No account, API key, or internet connection is needed after installation.

#### Key Features

- Press and hold Fn to dictate; release to insert cleaned text into any app, including terminals and code editors.
- Apple's SpeechAnalyzer transcribes audio in real time, while on-device Foundation Models remove filler words, resolve self-corrections, and fix punctuation.
- Application context detection adjusts formatting and vocabulary to match the active

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