Cerebro
Your Voice, Amplified
The AI-powered keyboard that turns your voice into text instantly — in any iOS app. Powered by OpenAI Whisper.
Download Free on the App Store No credit card required. No limits.Your thumbs will thank you
Speaking is 4x faster than typing on a phone. Use Cerebro for everything and the savings add up fast.
Everything you need to speak, not type
Powerful AI transcription paired with tools that make voice input actually useful.
AI-Powered Transcription
Powered by OpenAI Whisper for high-accuracy voice-to-text. Handles accents, background noise, and natural speech patterns.
Background Flow Sessions
Start a session in Cerebro, then switch to any app. The microphone stays active in the background, ready when you need it.
Polite Mode
Frustrated in the moment? Polite Mode uses GPT-4o to clean up profanity before you hit send, so your messages sound the way you actually want them to.
Custom Dictionary
Add names, technical terms, and custom vocabulary so Whisper recognizes the words that matter most to you.
See Your Time Saved
Track your productivity gains with built-in stats. See how many minutes you’ve saved versus typing manually.
Works in Every App
Installs as a system keyboard. Use it in Messages, Notes, Mail, WhatsApp, Slack, or any app that accepts text input.
Send it nice, not angry
We’ve all been there — you’re frustrated and fire off a voice message full of words you’ll regret later. Polite Mode catches the profanity before you hit send, so your message keeps the meaning without the heat.
Powered by GPT-4o, it’s context-aware AI that cleans up your language while preserving exactly what you wanted to say. Think of it as a cool-down filter for your voice.
“Where the are you? The meeting started 10 minutes ago. Get your over here now.”
“Sorry, where are you? The meeting started 10 minutes ago. Come to the meeting now, please. We are waiting for you.”
Three steps to faster communication
Set it up once, then speak freely wherever you type.
Install the Keyboard
Download Cerebro and enable it in your iOS keyboard settings. Grant Full Access so the microphone can be used for transcription.
Start a Flow Session
Open the Cerebro app and start a Flow Session. This activates the microphone so it’s ready when you need it from the keyboard.
Tap the Orb and Speak
Switch to Cerebro keyboard in any app, tap the glowing orb, and speak. Your words appear as text in seconds.
Your voice. Your data. Your device.
Cerebro is built with privacy at its core. Here’s how we protect you.
Audio Discarded Instantly
Voice recordings are deleted immediately after transcription. We never store, save, or retain your audio.
Text Stays on Device
Your transcriptions are stored locally on your device. We never upload, sync, or access your text content.
No Keystroke Logging
Full Access permission is used solely for microphone access. We never log, read, or transmit your keystrokes.
Simple, transparent pricing
No hidden fees. No subscriptions. Just start speaking.
Free for a limited time — no limits, no credit card required.
- Unlimited transcriptions
- Background Flow Sessions
- Polite Mode (profanity filter)
- Custom dictionary
- Productivity stats
- Works in every app
Stop typing. Start speaking.
Join thousands who’ve discovered a faster way to communicate.
Get Cerebro Free