Hold a key and talk — Bosun types your words wherever your cursor is, in your language or in theirs. Highlight text anywhere and translate it in place. No app to switch to, nothing stored.
macOS 13 or later · Apple silicon · Notarized by Apple
Bosun lives in the menu bar and listens for one key. Which one you hold decides what language comes out.
Hold it, talk, and your words are typed in your own language — whatever you've set as primary. Runs entirely on your Mac. No internet, no cost, no delay.
Hold it, talk, and the same sentence arrives translated — Russian, Spanish, French, Japanese, and a dozen more. Straight into whatever app you're typing in.
Highlight text anywhere — Mail, a browser, Messages — and it's replaced in place with the translation. Your clipboard is left exactly as you had it.
Got a reply you can't read? Highlight it, press the key, and it comes back in your language, right where it sits.
Russian, Spanish, and French change word forms depending on who's speaking and who's being addressed. Tell Bosun once whether you're writing as a man or a woman, and to whom, and the grammar comes out right — the difference between a machine translation and something a person would actually say.
Free 7-day trial on any of them — no card to start. And dictation in your own language stays free forever, plan or no plan.
Free
$0
Dictation in your own language, on Mac and iPhone. Yours forever.
Coming this month
Bosun Pro
$6.99 /mo
or $59/year — two months free
The AI is included. No API key, no Anthropic account, nothing to set up — just install and talk. Mac today; the iPhone keyboard joins the same subscription once it's out of App Store review.
Tell me when it’s readyAvailable now
Bring your own key
$2.99 /mo
or $29/year
Same translation features on your own Anthropic key. Cheaper, because the AI costs us nothing — you pay Anthropic directly for what you use.
SubscribeCancel any time, from the receipt email. No account to close, nothing held hostage — your licence simply stops renewing.
Not on Pro — the AI is included. On the bring-your-own-key plan you'll need a key from console.anthropic.com; Bosun uses your account, so you pay Anthropic directly for what you use (typically a fraction of a cent per message). Either way the key is stored only on your Mac and we never see your text.
Dictation in your own language is free forever — hold left Option and talk. A plan unlocks the translation side: right Option, ⌃⇧T, ⌃⇧E, and Translate clipboard. The 7-day trial opens everything. If a subscription lapses, dictation keeps working and your words are never lost — they're just typed untranslated.
Pro includes the AI: nothing to sign up for, nothing to configure, and it covers Mac and iPhone on one subscription. Bring-your-own-key is for people who already have an Anthropic account and would rather pay Anthropic directly — same features, lower price.
Dictation understands around 30 languages. Translation covers English, Spanish, Russian, French, German, Chinese, Japanese, Korean, Arabic, Hindi, Portuguese, Italian, Polish, Turkish, Ukrainian, Hebrew, Dutch, and more.
That's how Bosun types into other apps and notices the Option key. macOS calls it Accessibility. Bosun uses it for nothing else — it doesn't read your screen and doesn't log what you type.
Yes — a Bosun keyboard for iPhone that does the same job inside WhatsApp, Messages, and anywhere else you type. Coming to the App Store.