Start my day
Two minutes to clear yesterday's leftovers and pick what matters today.
A daily companion for your work
What do I do right now?
Klein keeps track of your calendar, the asks in your email, your voice notes and your meetings. Ask it any time, and it tells you what's next.
Windows now. Mac later. Starts with a 14-day free trial of Advanced.
How it works
You get on with your day. Klein keeps the list.
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Capture
Things reach Klein the way they already reach you.
- Your Google or Microsoft calendar
- Emails that ask you for something by a date
- Voice notes: press Ctrl+Alt+J and say "remind me to..."
- Reminders you type
- Notes from your meetings
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Klein keeps track
Everything lands in one list: what you owe, what other people owe you, and when. Ticked items stay ticked.
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Ask any time
Open the Now page, click the orb, or press Ctrl+Alt+K. Klein answers in a sentence or two, in text, out loud, or both.
Klein would rather miss something than guess. It only puts an item in front of you when there's a clear source: a calendar event with a real time, a reminder you set, or an email with a plain ask and a deadline. Anything vague stays out of the way until you look for it.
The orb
A small circle at the edge of your screen.
The orb sits on top of your other windows. Click it and it tells you what's next. It glows when something needs you, and stays quiet when nothing does.
Want a bit more? Klein Mini is a small window with what's now, what you're waiting on, a focus timer, and one box to file a reminder or ask a question.
- Ask what's nextCtrl+Alt+K
- Record a voice noteCtrl+Alt+J
- Take meeting notesCtrl+Alt+R
- Open Klein MiniCtrl+Alt+H
QuietNothing needs you. Get on with your work.
AmberA reminder you set just came due, or a meeting starts in 5 minutes.
RedSomething is late.
Click itKlein tells you what's next, in text, out loud, or both.
Your day
A few minutes at the edges of the day.
Short check-ins that keep the list honest, so the answer to "what now?" stays right.
Wrap up
See what you got done, settle what's still open, and look at tomorrow.
Week in review
What you finished, what slipped, and what's coming next week.
Still want these?
Things two weeks late get one question on your Now page: keep them, or let them go.
Meetings
Meeting notes, and no bot joins the call.
Klein takes notes from your own computer. Nobody gets an extra guest in their meeting.
- Both sides of the callOn Windows, Klein hears your microphone and the call's sound together.
- A notepad while you talkJot what matters. Afterwards your words stay in black and Klein's additions show in grey, so you always know which is which.
- Ask about a meeting"What did Kofi say he'd send?" Klein answers from the notes and shows where it came from.
- TemplatesShape the notes for a 1:1, a sales call, an interview or a stand-up.
- Tell people you're taking notesEach time notes start, Klein offers a short message to paste in the meeting chat.
Meeting audio is sent in short pieces to a transcription provider through OpenRouter, using only zero-data-retention endpoints. Klein doesn't store the audio, only the text.
Between you
What you owe each person, and what they owe you.
Every person gets a simple ledger. Late items come first. When someone promises you something in an email, it goes on their side, so you know who to nudge.
- Coming upBefore a meeting, see what's open with the people in it, and ask Klein to help you prepare.
- Two people called Ama stay two peopleKlein knows people by their email address, not just their name.
Privacy
Plain promises about your data.
Klein sees a lot of your working life. Here is exactly what it does with it.
Never used to train AI
Klein only uses AI providers that don't collect or train on what's sent. If none is available, the request fails instead of going somewhere else.
Voice notes stay on your computer
Your voice notes are turned into text on your own machine. The audio never leaves it.
Email bodies deleted within 7 days
Klein reads an email for an ask, keeps the task, the subject and the message ID, and deletes the text within 7 days.
Contacts: a name and an address
For the people you work with, Klein keeps a name and an email address. Nothing else about them comes from your mail.
Klein never sends or posts
It reads your calendar, mail and tasks. It never sends an email or posts anywhere. Follow-ups open in your own mail app.
Read-only, unless you say yes
Calendar access is read-only. On Advanced you can switch on calendar changes, and even then Klein only changes an event after you say yes.
Spoken answers in Klein's cloud voice are made by a Microsoft voice model with zero data retention; only Klein's own answer is sent, never your mail or notes. Prefer nothing in the cloud? Pick an on-device voice instead. The details are in the privacy policy.
Klein for Windows is almost ready.
Leave your email and we'll tell you when you can download it. You'll start with a 14-day free trial of Advanced.
Windows now. Mac later.
Core
Pricing coming soon
- The whole daily loop: Now, the orb, reminders and Ask Klein
- Calendar, tasks and one inbox
- Voice notes and people
- A brief before each meeting
- 20 meeting notes a month, and 90 days of history
- On-device voices
Advanced
Pricing coming soon
- Everything in Core
- Klein's cloud voice
- A live transcript during meetings
- A second inbox
- Unlimited meetings and history
- Calendar changes, with your yes each time
Questions
Honest answers.
What happens to my data?
Your tasks, reminders and notes are stored in Klein's database so they're there whenever you open the app. Voice notes are transcribed on your computer. Email text is deleted within 7 days; Klein keeps only the task it found, the subject and the message ID. For contacts, it keeps a name and an email address.
You can ask for everything to be deleted at any time. The privacy policy has the full list.
Which calendars and inboxes work?
Google (Calendar and Gmail) and Microsoft (Outlook calendar and mail), plus their task lists. Access is read-only. Core includes one inbox; Advanced adds a second.
Is there a Mac version?
Not yet. Klein is a Windows desktop app today. Mac comes later. There's no web version.
Does Klein record my meetings? What about consent?
Only when you start meeting notes yourself. No bot joins the call, so it's on you to tell people, and Klein makes that easy: each time notes start, it offers a short message to paste in the meeting chat. Recording laws differ by place, so check what applies to you.
The audio goes in short pieces to a transcription provider with zero data retention, and Klein doesn't keep it. Only the text is stored.
Is my data used to train AI?
No. Klein's AI requests only go to providers that don't collect or train on what's sent, and it's on for everyone by default. If no such provider is available, the request fails rather than going elsewhere.
Does it work offline?
Partly. Reminders, ticks and voice notes you capture while offline are kept on your computer and sent when you're back online. Voice notes are transcribed on your computer either way. New email, calendar changes and Klein's written answers need a connection.
How much does it cost?
Pricing is coming soon. Every new account starts with a 14-day free trial of Advanced, then you choose Core or Advanced.
What's the difference between Core and Advanced?
Core is the whole daily loop: calendar, tasks, voice notes, reminders, the orb, Ask Klein, people, a brief before each meeting, one inbox, 20 meeting notes a month, 90 days of history and on-device voices.
Advanced adds Klein's cloud voice, a live transcript during meetings, a second inbox, unlimited meetings and history, and calendar changes when you approve them.