Cosmas
ENCZ
Open the chronicle

Cosmas for Windows

DownloadCosmas

The desktop app for 64-bit Windows 10 and 11. Free, installs without administrator rights and syncs with the web when you sign in with Discord.

Download Cosmas 1.2.0 Open the web version Alpha
Version
1.2.0
Size
294 MB
Released
6 Nov 2026
System
Windows 10 / 11, 64-bit
SHA-256
not published for this release

Cosmas-Setup-1.2.0.exe · Release notes · All versions on GitHub

System requirements

System
Windows 10 (version 1809 or newer) or Windows 11, 64-bit.
Disk space
About 294 MB for the installer, a little more once installed. Local AI is optional and needs roughly 2–20 GB more for models, depending on your graphics card; speech recognition on NVIDIA cards downloads about 1.5 GB of CUDA libraries once.
Graphics card
Any. An NVIDIA card makes local speech recognition fast; without one, use the processor (slow) or a paid AI service.
Rights
No administrator rights: Cosmas installs for your Windows user only.
Internet
For sign-in, sync, updates and downloading AI models. Your catalogue works offline.

Install

Five steps, about two minutes.

  1. Download

    Get the installer from the button above or from the GitHub releases. Only download it from these two places.

  2. Run it

    The installer isn’t code-signed yet, so Windows SmartScreen may say “Windows protected your PC”. Click More info, then Run anyway.

  3. Install

    Choose the language, tick whether you want a desktop shortcut and click Install. Windows won’t ask for administrator rights.

  4. First run

    Cosmas finds your Medal recordings on its own; add OBS, ShadowPlay or other folders in Settings. When you first transcribe, choose where AI runs.

  5. Sign in with Discord

    To sync with the web: Settings → Web chronicle → Sign in with Discord. Your browser opens, you click Allow, and that’s it.

What the installer does

  • Program

    Installs to %LOCALAPPDATA%\Programs\Kronikar for your user only, with a Start menu shortcut and an optional desktop one.

  • Your data

    Catalogue, thumbnails, attachments, transcripts and models live in %LOCALAPPDATA%\Kronikar. Your videos stay where they are.

  • Old name

    The folders keep the app’s former name, Kronikář, so updates over older installs keep working.

Update

Cosmas checks for new versions and offers to download and install them; the download is verified against its SHA-256 before it runs. Or download the new installer here and run it. It replaces the program, keeps your data, and closes Cosmas first if it is running.

Uninstall

Windows Settings → Apps → Installed apps → Cosmas → Uninstall. At the end it asks whether to delete your catalogue too; the answer is No unless you choose Yes. Your video files are never deleted.

No Windows PC?

The web version runs in any modern browser. It’s an early alpha without the heavy desktop features, but your chronicle is the same.

Open the web version Desktop or web