Introducing JustVoice
The fastest, most private voice transcription app for Mac. GPU-accelerated. Local-first. Your voice never leaves your device.
We built JustVoice because we were tired of choosing between speed and privacy.
Every dictation tool we tried either shipped our voice to someone else's servers, produced sloppy output riddled with errors, or both. We wanted something that felt different — fast, intelligent, and fundamentally private.
So we built it. Today, we're launching JustVoice for macOS.
The Problem
That 4x gap is where ideas get lost — thoughts that fade while your fingers struggle to keep up.
Built-in macOS Dictation sends your audio to Apple's servers. Third-party tools like Otter or Rev are cloud-only by design. And the output from most speech-to-text engines still requires significant manual cleanup.
JustVoice closes every one of those gaps.
How It Works
Hold your hotkey, speak, release. Here's what happens in those few seconds — all on your Mac.
Audio Capture
Microphone input captured at 16 kHz with a high-pass filter to remove background rumble.
Voice Activity Detection
Multi-layer VAD (GMM-based + energy fallback) pinpoints exactly when you're speaking. Filters clicks, breaths, and background noise.
Local Transcription
OpenAI's Whisper runs directly on your GPU via Metal acceleration. Multiple model sizes, 90+ languages.
Smart Cleanup
A rule engine removes filler words ("um", "uh"), handles voice-dictated punctuation, detects self-corrections, and formats lists.
AI Polish
A local language model corrects grammar, fixes capitalization, and adapts tone based on the app you're using.
Text Insertion
Final text appears at your cursor. Adaptive timing tuned for native macOS, Electron, and terminal apps.
All of this happens in seconds. No internet. No cloud. Just your Mac.
Features That Set JustVoice Apart
Every feature is designed around one principle: get out of your way and let you think.
Works Everywhere
Dictate into any app — Mail, VS Code, Slack, Chrome, Notes, Pages, your terminal. One configurable hotkey activates dictation system-wide.
Context-Aware Intelligence
Detects your active app and adapts tone automatically. Formal for email, technical for code editors, casual for messaging. Create custom App Profiles for any app.
Voice Commands
Select text and speak naturally: "Summarize this", "Formalize this", "Translate to Spanish", "Fix grammar." Use "Hey JustVoice" as a wake word.
Code Mode
Purpose-built for developers. Recognizes programming terminology, formats identifiers (camelCase, snake_case), and injects relevant jargon for better accuracy.
Personal Dictionary & Snippets
Add custom terms with spoken forms ("A P I" → API). Create voice-activated snippets with variables like {date}, {time}, and {clipboard}.
File Transcription
Drop WAV, MP3, M4A, OGG, FLAC, or WebM files for full transcription. Same Whisper engine, same local processing.
Choose Your Plan
Three tiers, no hidden fees. Every plan works offline. Upgrade or cancel anytime.
5,000 words/month with local transcription. Try JustVoice and see if voice input fits your workflow.
- Local Whisper transcription
- Rule-based text cleanup
- Sound effects
- 10 snippets, 20 dictionary words
- 7 days note history
- Works completely offline
50,000 words/month with AI cleanup, all models, and voice commands. The full JustVoice experience.
- 50,000 words/month
- All Whisper models (up to Turbo)
- Local AI grammar & formatting
- Voice commands
- Unlimited dictionary & snippets
- 90 days note history
- Cloud sync to web dashboard
Unlimited words, cloud STT, code mode, and app profiles for power users and professionals.
- Everything in Plus
- Unlimited words
- Cloud STT via Deepgram Nova-2
- Cloud AI cleanup (Claude / GPT-4o)
- Code Mode & App Profiles
- Unlimited note history
- Priority support
Built for Apple Silicon
JustVoice is a native macOS app built with Tauri and Rust. The Whisper and LLM models run via Metal GPU acceleration on Apple Silicon — significantly faster than real-time on M1 and newer chips.
Privacy Is the Default
We want to be direct about what JustVoice does and doesn't do with your data.
Local Mode
Free & Local- Zero data leaves your device
- No audio transmitted, ever
- No analytics in the desktop app
- Models run on your GPU
- Notes stored in local database
Cloud Mode
Pro · Opt-in- Audio streamed to Deepgram, not stored
- Text sent to Claude/GPT-4o for cleanup
- Optional sync to web dashboard
- Every cloud feature individually toggleable
- Falls back to local if cloud is unreachable
What's Next
This is version 1.0. We have a clear roadmap, and your feedback shapes what comes next.
Get Started
JustVoice is available today for macOS. Free to start, no credit card required.
Speak your first sentence and feel the difference.
Download for macOSRequires macOS 13.0 or later. Apple Silicon recommended.