Get your thoughts written as fast as you think them.
Talk the way you think. Cofactor turns it into clean, ready-to-send text in any app on your iPhone or Mac.
See it clean up a real sentenceSee how it compares
The thumb-typing tax costs you more than time.
3xIn a Stanford study, people entered text about three times faster by speaking than by typing on a phone. Your thumbs are the slow part. Stanford study: 153 vs 52 words per minute. Not a Cofactor benchmark.
Replies that wait.
The real answer waits for “when I’m at a laptop,” and it nags at you all day.
Ideas that fade.
Half the idea is gone by the time the first line is typed.
Cleanup you never asked for.
Built-in dictation keeps every false start. Some cloud apps upload your audio and limit free dictation.
You shouldn’t have to pay by the word or hand over your voice to be heard.
Say it once. It comes out ready to send.
All included free.
Emails and replies in seconds.
Mail gets a greeting and a sign-off. Messages stays casual. Change your mind mid-sentence and only the correction lands.
Writing that sounds like you.
Your names and jargon spelled right, in the tone you pick, with word predictions on the iPhone keyboard.
Every thought kept.
Every take is saved before it’s transcribed. After a one-time language download, it works with zero bars.
We kept losing good thoughts to bad typing too.
So we built a keyboard that keeps your voice private and saves every take.
- Your audio never leaves your device.On every plan. Text leaves only if you turn on sync, the Automation API or your own AI provider.
- Free dictation with no word cap.On iPhone and Mac, with no account and no trial clock.
- Works with no signal.Recognition and cleanup run on your device after a one-time language download.
- Nothing gets lost.Every take is saved before it’s transcribed, and Retry works offline too.
Checked against the apps you’ve heard of.
Four of 28 questions, from each company’s own pages.
Swipe the table sideways to see every app. The questions stay put.
| Question | Cofactor | Apple Dictation | Wispr Flow | Superwhisper | Willow Voice |
|---|---|---|---|---|---|
| Can I dictate as much as I want without paying? | Yes · Free | Yes · Free | No · Pro only | Yes · Free | Partly · Free |
| Does my voice stay on my phone or computer? | Yes · Every plan | Mostly · Free | No · Any plan | Partly · Free | Partly · Plan not stated |
| Can I use it without creating an account? | Yes · Free | Yes · Free | No · Any plan | Partly · Free | Not listed · Any plan |
| Does the writing style change to fit the app (email vs chat)? | Yes · Free | No · Any plan | Partly · Plan not stated | Partly · Pro | Partly · Plan not stated |
“Plan not stated” means the company doesn’t say which plan includes it. “Not listed” means we couldn’t find it in their own pages. Checked October 9, 2026.
Start talking in three steps.
- 1
Download Cofactor
Free for iPhone and Mac.
- 2
Turn on the keyboard
It’s a switch in Settings, and the app walks you through it.
- 3
Tap the mic and talk
In Messages, Mail, Slack or anywhere else you type.
Our promise to you: your audio never leaves your device, you don’t need an account, and dictation has no word cap.
A voice keyboard for iPhone and Mac that writes what you meant.
Cofactor is a free voice keyboard for iPhone and a dictation app for Mac. Tap the mic in any app and talk normally. It writes clean, punctuated text, keeps only your corrections, turns spoken lists into bullets or numbered steps and adds an email greeting and sign-off. It runs on your device, works offline after a one-time language download and never sends your audio anywhere. Pro adds custom writing modes, Maximum polish and our most accurate speech model. You say it once, and it’s already written.
See it clean up a real sentence.
Pick an example. On the left is what the mic heard. On the right is exactly what Cofactor wrote, taken from its own test cases.
Lists come out as plain-text lines that start with “-” or “1.”, so they paste cleanly into any app.
Start free. Upgrade if you want more.
Everything you need to talk instead of type is free, with no time limit.
Free
For anyone who thinks faster than they type.
- Unlimited on-device dictation, iPhone and Mac
- The full iPhone keyboard with word predictions
- Email and chat formatting that matches the app
- Cleanup, Redo and five writing tones
Pro
Or $67.99 a year, about $5.67 a month.
- Everything in Free
- Custom writing modes and saved instructions
- Your own formatting rules for each Mac app
- Maximum polish on Apple Intelligence devices
Team
Minimum 3 seats, billed monthly.
- Everything in Pro
- Shared vocabulary and saved phrases
- Team default model and formatting
- Seats, roles and admin controls
Prices in USD. In the App Store, Pro is $9.99 a month or $79.99 a year. Downgrading never deletes your recordings, notes or history.
Questions before you choose
Does Cofactor work offline?
Yes. Dictation and formatting run on your iPhone or Mac. On iPhone, the speech language downloads once the first time you use it. After that, no connection needed.
Is it really free?
Yes. Unlimited on-device dictation, the full keyboard, cleanup, email and chat formatting, writing tones, your vocabulary, saved phrases, history and backup are free. Pro adds custom writing modes, Maximum polish, our most accurate speech model, advanced insights and your own per-app rules on Mac.
Where does my audio go?
Your audio never leaves your device, on any plan. Text leaves only if you turn on sync, the Automation API or your own polish provider. You only need an account for sync, the Automation API or Team features.
Stop typing it out. Say it once.
TodayYou thumb out a reply at a red light, lose the idea halfway, and fix the run-on dictation handed you.
With CofactorYou say it once and it lands clean in whatever app you’re in. The email has a sign-off, the list is a list, and your voice stays on your device.
Launching soon on the App Store.