Your Voice, Amplified
Cerebro Keyboard is an AI voice keyboard for iPhone. Tap the orb, speak, and your words appear as text in WhatsApp, Mail, Notes and almost any other app.
Download Free on the App Store Free download with 20 transcriptions a month. No account needed.Your thumbs will thank you
In a Stanford study, speaking was about three times faster than typing on a phone. Here’s what that adds up to if you type 30 minutes a day.
Example calculation based on Ruan et al., Stanford University (2016). Cerebro Keyboard shows your own estimate in the app. Read the Stanford study (PDF)
Everything you need to speak, not type
Powerful AI transcription paired with tools that make voice input actually useful.
Transcription by OpenAI
Cerebro Keyboard sends your recording to OpenAI’s speech-to-text model and inserts the result right where your cursor is. No copying, no pasting.
Background Flow Sessions
Tap the mic and Cerebro starts a session for you. The microphone then stays ready for 10 minutes after each dictation, and you can end the session from the Dynamic Island or Lock Screen.
AI Text Transform Modes
Speak naturally and let AI reshape your words: professional for emails, casual for friends, concise for notes, or translated into one of 30 languages. Pick a mode before you speak.
Custom Dictionary
Add names, technical terms, and custom vocabulary so the AI recognizes the words that matter most to you.
See Your Time Saved
See an estimate of how much time you’ve saved compared with typing, right in the app.
Automatic Language Detection
Speak English, German or one of many other languages. Cerebro Keyboard detects the language by itself, so there’s nothing to switch.
Works in Almost Any App
Installs as a system keyboard for Messages, Notes, Mail, WhatsApp, Slack and most apps with a text field. In password fields, iOS switches to its own keyboard.
Speak once. Send it any way you want.
Pick a mode, speak once, and the AI rewrites your words before they’re inserted: professional emails, casual texts, translations.
Professional
Casual
Concise
Translate
Clean
Custom
Create your own AI mode with any prompt you can imagine. Summarize, turn it into a haiku, rewrite as a tweet — anything.
7 built-in modes, 4 community modes and as many custom modes as you like. You can also submit your own to the community.
Three steps to faster communication
Set it up once, then speak freely wherever you type.
Install the Keyboard
Download Cerebro Keyboard and add it in your iOS keyboard settings. Allow Full Access so the microphone can be used for transcription.
Tap the Mic
In the app you’re typing in, switch to Cerebro Keyboard and tap the glowing orb. The first time, Cerebro opens for a moment to start listening — just swipe back.
Speak and Send
Your words appear as text right where you’re typing. For 10 minutes after each dictation, the mic starts instantly, with no app switch.
What happens to your voice
Cerebro Keyboard sends only what it needs to. Here’s exactly what leaves your iPhone and what doesn’t.
Audio Isn’t Kept
Your recording goes through our server in Germany to OpenAI for transcription, on servers outside the EU. Afterwards the audio is discarded; we don’t store it.
Transcripts Stay on Your iPhone
Your transcriptions are saved only on your device. Text you send to an AI mode goes to Claude by Anthropic, on servers that keep nothing.
No Keystroke Logging
Full Access is used only to reach the microphone and send audio for transcription. Cerebro Keyboard never logs, reads or sends what you type. No account needed.
What you dictate is processed by AI models from OpenAI and Anthropic. Don’t dictate passwords, card numbers, health information or anything else confidential.
Simple, transparent pricing
Start free with 20 transcriptions every month. Upgrade anytime — cancel anytime.
20 transcriptions every month — no credit card required.
- 20 voice transcriptions / month
- +5 a month for each friend who joins and uses it on 2 days (up to 10)
- AI Text Transform Modes
- Custom dictionary
- Productivity stats
- Works in almost any app
or $47.99/year — save 33%. Prices vary by region.
- Unlimited voice transcriptions
- AI Text Transform Modes
- Custom dictionary
- Productivity stats
- Works in almost any app
Questions people ask about Cerebro Keyboard
Short, factual answers. More help is on the support page.
What is Cerebro Keyboard?
Cerebro Keyboard is an AI voice keyboard for iPhone, made by Allonsy GmbH in Hamburg, Germany. You tap the orb, speak, and your words are inserted as text in the app you’re using. It’s free to download on the App Store.
What’s the best AI voice keyboard for iPhone?
It depends on what you need: Apple Dictation is free and built in, Wispr Flow also runs on Mac, Windows and Android, and Cerebro Keyboard focuses on iPhone with AI modes that rewrite or translate what you say. Cerebro Keyboard’s free plan includes 20 transcriptions a month, so you can compare it yourself.
Does Cerebro Keyboard work in WhatsApp?
Yes. Cerebro Keyboard is a system keyboard, so it works in WhatsApp, Messages, Mail, Slack and most other apps with a text field. iOS always shows its own keyboard in password fields, and some apps, such as certain banking apps, don’t allow third-party keyboards.
Is Cerebro Keyboard free?
Cerebro Keyboard is free to download and includes 20 transcriptions every month, with AI modes and the custom dictionary included. Cerebro Pro removes the monthly limit for $5.99 a month or $47.99 a year in the US; prices vary by region. No account is needed.
How do invites work?
In the app, tap “Invite friends” in Settings to share your code. A friend who is new to Cerebro Keyboard and redeems it within 14 days of installing gets 5 extra transcriptions every month on top of the free 20, once they’ve dictated. You get 5 extra every month for each friend who then makes 3 transcriptions on 2 different days within 30 days, for up to 10 friends. The invite rules in our Terms of Use apply.
Which languages does Cerebro Keyboard understand?
Cerebro Keyboard detects the language you speak automatically, so there’s no language setting to change. It handles English, German and many other languages, though accuracy varies by language. The app itself is available in English, German, French, Spanish, Italian, Dutch, Norwegian Bokmål, Swedish, Danish, European Portuguese, and Brazilian Portuguese.
Where does my voice go when I use Cerebro Keyboard?
Cerebro Keyboard sends your recording through its server in Germany and OpenRouter to OpenAI, which transcribes it on servers outside the EU; the audio is discarded afterwards. Your transcriptions are stored only on your iPhone. Text you send to an AI mode goes to Claude by Anthropic, run by Google Cloud or AWS in the EU where available, on servers that keep nothing.
Why does Cerebro Keyboard use OpenAI?
Cerebro Keyboard uses OpenAI because its newest speech model, gpt-transcribe (the successor to Whisper), is one of the most accurate available and copes well with names, accents and switching between languages. AI modes use Claude by Anthropic, which rewrites and translates especially naturally. Both run in the cloud, so don’t dictate anything confidential.
Is it safe to dictate passwords or health details?
No. What you dictate with Cerebro Keyboard is processed by AI models from OpenAI and Anthropic, so don’t dictate passwords, card numbers, health information or anything else confidential. Type those with your regular keyboard instead.
How is Cerebro Keyboard different from Apple Dictation?
Apple Dictation is free, built into the iPhone keyboard and works offline in many languages; Cerebro Keyboard needs an internet connection but can rewrite, shorten or translate what you say before it’s inserted. Cerebro Keyboard also detects your language automatically and has a custom dictionary for names and jargon.
Does Cerebro Keyboard work offline?
No. Cerebro Keyboard needs an internet connection because transcription runs on a server. To dictate without a connection, use Apple Dictation, which works offline in many languages.
What do I need to use Cerebro Keyboard?
Cerebro Keyboard needs an iPhone with iOS 17.0 or later, an internet connection and Full Access for the keyboard. Because iOS keyboards can’t use the microphone, the first tap opens the Cerebro app for a moment. The microphone then stays on for 10 minutes after each dictation (iOS shows the orange dot), but audio is only recorded and sent when you tap the orb.
Can I still type with Cerebro Keyboard?
Cerebro Keyboard is built for speaking: it has delete, space and return keys, but no letter keys. To type, tap the globe key to switch to your usual keyboard, then switch back to dictate.
Stop typing. Start speaking.
Try Cerebro Keyboard free: 20 transcriptions every month, no account needed.
Download Cerebro Keyboard