Built with Rust + Metal

Zero typing.
Pure voice.

Speak your thoughts and let Input 0 do the rest. Native macOS integration meets high-fidelity AI transcription. Speak. It's done.

Transcription Active

Processing high-fidelity voice stream...
Metal GPU Active Voice Stays Local
⌥ Space

Performance by Design.

Press & Speak

Global hotkey integration. No window switching, no friction. Just hold and talk from anywhere in macOS.

Option + Space

Privacy-First Architecture

Voice transcription runs entirely on your Mac via Metal GPU — your audio never leaves the device. Text optimization connects to your own LLM API, giving you full control over your data pipeline.

Your voice stays local

AI Polish

LLM-powered optimization removes filler words, fixes grammar, and corrects 40+ technical terms by pronunciation (e.g., 'rui en te' → 'React'). Context-aware with 10-message history.

Auto-Paste

Transcribe and inject text directly into Slack, VS Code, or your browser without a single click.

Multi-Language

4 AI engines with 9 models covering 99+ languages. Smart recommendation picks the best model for your language automatically.

English 中文 日本語 한국어 Español Français Deutsch 99+

4 AI Engines. 9 Models.

Not just Whisper. Choose the best engine for your language and speed requirements. Download only what you need.

Whisper
6 models · 99 languages
SenseVoice
Best for CJK
Paraformer
Chinese · Ultra-fast
Moonshine
English · 5× faster

Custom Vocabulary

Add your own terms — names, brands, jargon. The AI also auto-learns from your corrections via LLM validation.

Privacy by performance.

Three steps to a faster workflow. No accounts, no clouds, no tracking.

01

Hold Key (Option+Space)

Activate Input 0 from anywhere. The interface appears as a subtle glass overlay that respects your focus.

02

AI Transcribe & Polish

Release the key and Input 0 transcribes your speech locally, then an LLM refines it into polished, professional text.

03

Auto Paste

Release the key and the text is automatically injected into your active application. System-level integration.

Experience the flow.

Supports Apple Silicon Macs

Input 0