Download

Download Klorn. Check this first.

Klorn runs on Mac, on Windows in beta, and in any modern browser, all signed in to the same Klorn account. Here is what it runs on and connects to, including what it does not.

Download for Mac Open in browser

macOS 14+Windows betaAny modern browser

Three ways to run it

  • Mac

    Available

    One universal build for Apple Silicon and Intel. Needs macOS 14 or later.

    Download Klorn.dmg

  • Windows

    Beta

    The desktop app for Windows, in beta. Windows may show a SmartScreen warning on first launch until the app is code-signed.

    Download the installer

  • Browser

    Available

    Linux and phones run Klorn in the browser. There is no native mobile app.

    Open in browser
Works with

Check this before you download.

Klorn reads your mail, so what it runs on and connects to is the first thing worth knowing.

  • macOS 14 or laterUniversal: Apple Silicon and Intel.
  • Windows desktop app, in betaSmartScreen may warn on first launch until the app is code-signed.
  • Linux and mobile in the browserThere is no native mobile app; phones and Linux use the web app.
  • 7 interface languagesEnglish, 한국어, 日本語, 中文, Español, Français, Deutsch. Replies come back in the language the mail arrived in.
Accounts

Accounts you can connect

Signing in brings your first Google account. Add the others from Settings.

  • GmailAvailable

    Sorted, summarised and searchable.

  • Google CalendarAvailable

    Your events beside your mail. New events only when you say so.

  • Naver MailBeta

    Read and sorted alongside everything else.

  • iCloud MailBeta

    Your Apple address, in the same list.

Not supported: IMAP hosts other than Naver Mail and iCloud Mail cannot be connected.

First launch

What to expect the first time

Mac

  1. Open Klorn.dmg and drag Klorn into Applications.
  2. Open Klorn from Applications.
  3. Sign in with your Klorn account. If you do not have one yet, create it in the browser with your Google account.

Windows

  1. Run Klorn-windows-setup.exe.
  2. If SmartScreen says Windows protected your PC, choose More info, then Run anyway. The warning appears until the app is code-signed.
  3. Sign in with the same Klorn account you use on the web.

Release notes and every build are on GitHub Releases.

Checked 2026-10-14 against the repository. Something here wrong? Tell us.