MailTwin
Your inbox is a part-time job. Fire it.
The most-quoted number here is McKinsey's: professionals spend about 28% of the working week on email, which works out near 2.6 hours a day. It is worth knowing that the study dates from 2012, so treat it as the shape of the problem rather than as a measurement of your Tuesday. The figure that matters is your own, and the email time calculator works it out in a minute.
What is not in dispute is who feels it. If you are a lawyer, a consultant, an accountant, an agent, or anyone whose clients live in their inbox, the volume is not the hard part. The hard part is that so much of it waits on a reply only you can write.
Do the math on your own week: if a considered, professional reply takes two minutes — the conservative figure MailTwin itself uses when it estimates your saved time — and you write forty of them a day, that is well over an hour. Every day. It's the job you never applied for — and it's the part of your work that AI should have fixed years ago.
Now imagine answering most of them with keywords and a click.
Select the email. Type what you want to say, in shorthand:
can't friday, propose tuesday, ask about invoice
MailTwin writes the full, professionally typed reply — ready to send in seconds instead of several minutes. And not in generic AI-speak: in your voice, learned locally from your own sent mail, kept separate for every account so work-you and weekend-you each sound right.
This isn't a roadmap. Version 1.1 shipped it: press Return to generate, Return again to insert — the entire reply loop lives on your keyboard, and Mail prepares your reply window while the AI writes, so inserting is instant. There's even Insert & Archive to close the loop in one motion — receipted and undoable, like everything MailTwin does.
And version 1.2 removed the last step between you and the reply: type your keywords directly into Mail's own reply window, press Expand, and they become the finished message in place — above the quote, your signature untouched. New Macs now start in a panel that is nothing but a box and the Return key.
You stay the author.
Every draft waits for your review, and every rewrite of an existing draft passes a local validator that rejects changed numbers, links, addresses or invented sign-offs. You just stop doing the typing.
The rest of the equation: it lives inside Apple Mail (no new inbox to move into), you choose the AI — Claude, ChatGPT, Gemini, or free on-device with Apple Intelligence or Ollama — and your email never touches our servers — there is no MailTwin server in the AI path at all. (We do run servers for updates, licensing and opt-in telemetry; none of them ever see a message.)
Stop writing email. Start approving it.
30-day free trial, no card. Then $19.90 — once.