Skip to content
Letos is in beta.What that means
Switch to Czech: CSGet an invite

The app for this year

Mail, calendar and tasks finally in one place.

Turn an email into a task, the task into time.

A fast app for your Mac and iPhone. You don't have to keep anything in your head, and your data stays with you.

Get a beta inviteSee how it works

Invites from December 2026 · limited number · public on 1 January 2027

The Letos mark: a single stroke makes a loop and runs on to an orange dot.
The loop is your year. The dot is the goal it leads to.
  • Mac and iPhone in beta · web, Windows and Linux coming
  • Your data stays with you
  • Free forever, no AI surcharge
Letos on a computer: a five-day calendar with a morning stand-up, planning and lunch, today's tasks beside it. Demo data, Czech interface.
The Letos task board: Today, Inbox, Work and Scheduled columns with demo tasks. Czech interface.

How it works

Email becomes a task, the task becomes time.

Turn an email into a task with Create task, then drag the task into your calendar. No copying between apps.

  1. Mail → task

    An email that wants something is a task.

    Create a task from it with Create task. The link to the message stays with the task.

    Demo: in the inbox, the email “Meeting next week” becomes a task with the same name, attachment included, via Create task.

  2. Task → time

    Drag the task onto your calendar.

    Drop it on a free slot in your week and it gets a one-hour block. On the Mac, with a connected calendar.

    Demo: the task “Meeting next week” is dragged from the Unscheduled list onto Tuesday 9:00 in the calendar and becomes a one-hour block with the same name.

  3. Reply

    AI drafts the reply in your style.

    Type what you want to reply and on-device AI prepares a draft. You send it yourself.

    Local AI runs only on the Mac for now. Windows and Linux are coming. It doesn't run locally on iPhone or the web; you can set up your own AI endpoint on iPhone.

    Demo: for the email from Petr Svoboda, you type the intent “agree, suggest Tuesday” and on-device AI drafts the reply “Hi Petr, Tuesday at 9 works for me. I'll send the notes a day early.” You have to send it yourself.

Get a beta inviteInvites from December 2026 · limited number · public on 1 January 2027

From the year to today

Coming

Year, quarter, week, today.

Break your 3–5 yearly goals into quarterly milestones, weekly commitments and today's plan.

Diagram: the yearly goal “Write a book” becomes the Q1 milestone “First three chapters”, the week-6 commitment “Chapter 1: draft”, and today a writing block from 9 to 11.
  1. Year2027

    Write a book

    1 of 3–5 goals

  2. QuarterQ1

    First three chapters

    milestone

  3. WeekWeek 6

    Chapter 1: draft

    commitment

  4. TodayTuesday

    Writing

    9:00–11:00

Wherever you work

Mac and iPhone in beta. Web, Windows and Linux coming.

The Mac does everything, iPhone comes with you. Web, Windows and Linux are coming.

  • macOSmail, tasks, calendar, AI
  • Windowscoming
  • Linuxcoming
  • iPhonemail, tasks, calendar
  • Webcoming
Letos on a computer: a mail list, the open thread “Meeting next week” and today's tasks on the right. Demo data, Czech interface.
Letos on iPhone: the inbox with a bottom bar for Mail, Calendar, Tasks and Settings. Demo data, Czech interface.

Agents · MCP

Coming

Connect your AI assistant to Letos.

A local MCP server gives your assistant access to mail, calendar, tasks and goals. You send the replies yourself.

Letos for agents

Privacy

Your data stays with you.

Mail, calendar and tasks live in a database on your computer. Only encrypted data travels between your devices, and the server can't read it.

Straight to your mailbox

No third-party mail API between you and your mailbox.

Encrypted sync

The server carries encrypted data only. It never sees the content.

No telemetry

Nothing is measured in the app. Crashes stay in a local log.

From the founder

Why Letos exists

The year is the one unit in which people genuinely commit to something. Tools ignore it anyway: tasks in one app, the calendar in another, and your day run by the inbox.

I'm building Letos the other way round: the year on top, today beneath it, and mail serving both.

Everything runs on your own device, because I wouldn't send my own year to anyone either. I build it alone, so I can keep Letos small and honest.

FAQ

Before you sign up

More pricing questions
When can I start using Letos?

Invites go out from December 2026 and Letos opens to everyone on 1 January 2027. The number of invites is limited, because Letos is built and supported by one person.

How much does it cost?

Letos is free forever for 1 mailbox and 1 device. Letos Plus is €60 a year or €6 a month and adds unlimited mailboxes, 5 devices and sync. AI is free on every plan.

Where does my data live?

On your device. Mail, calendar and tasks sit in a local database. Only encrypted blocks travel between your devices, and the relay never sees their content. Nothing is measured in the app.

Will it work with my email?

Letos connects to the mailbox you already have: directly over IMAP, and Gmail through Google sign-in. The web version will have no mail, just tasks and calendar.

What happens if I stop paying?

Your mail, calendar and tasks are not deleted. Mailboxes and devices over the limit are deactivated, you choose which ones stay active, and they come back after your next payment. The one exception is synchronized attachments over 100 MiB: they are deleted after 14 days, details are on the pricing page.

Does Letos work offline?

Yes, fully. The app never waits for the network; your mail, calendar and tasks are on your computer.

What will you send me after I sign up?

One email to confirm your address, then one with your invite when it's ready. No newsletter unless you switch it on yourself.

Invites

Want an early invite?

Invites go out from December 2026, public launch on 1 January 2027. Leave us your email and we'll tell you the moment there's something to try.

Free during the beta. Pricing

  1. TodayConfirm your email with one click.
  2. December 2026We send your invite. Numbers are limited.
  3. 1 January 2027Letos opens to everyone.

We'll send you one confirmation email, and after that just one more, when your invite is ready. No newsletter unless you switch it on yourself.