Scheduling infrastructure for everyone.
Publisher’s description
What is Cal?
Cal by Cal is open-source Windows software in the project management category. It ranks 19th by popularity among project management in this catalogue. It is written in TypeScript.
Installation and requirements
The publisher provides EXE (NSIS) installers for 64-bit Windows. The main installer is 89.7 MB. It can be installed for the current user only, without administrator rights. A silent install is possible with the installer’s documented switches.
Updates and version history
The current version is 1.10.1, released on January 18, 2026. The version history goes back to January 20, 2024: 5 releases, all linked to the official files. That is about 2.5 releases a year.
Popularity and file types
The source code on GitHub (calcom/cal.diy) has 49,213 stars. Similar programs include Todoist, GanttProject and XrmToolBox.
Project description on GitHub: “Scheduling infrastructure for absolutely everyone.”
Pros / Cons
Pros
- Open source: the code can be inspected and built by anyone
- Documented silent install
- Installs without administrator rights
- Large user base
Cons
- No native ARM64 build
In short: Cal is an open-source project management tool for 64-bit PCs. Administrators can deploy it unattended.
Is Cal safe to download?
- The file is served by download.todesktop.com; check that it is the publisher’s official mirror
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
21624AC2E5172CE5BEAAC6CBA1A17EA6718D4A65E72DBC20A86923EE5F96708C· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- The source code is public
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 5 versions ›5 versions over 2 years · about 2.5 a year
| Version | Date | Size | Files |
|---|---|---|---|
| 1.10.1Latest | January 18, 2026 | 89.7 MB | 64-bit EXE (NSIS) |
| 1.10.0 | August 8, 2025 | 82.7 MB | 64-bit EXE (NSIS) |
| 1.9.0 | July 11, 2025 | 82.7 MB | 64-bit EXE (NSIS) |
| 1.8.0 | July 11, 2025 | 82.7 MB | 64-bit EXE (NSIS) |
| 1.6.1 | January 20, 2024 | 75.3 MB | 64-bit EXE (NSIS) |
Install from the command line
Silent install ›winget install --id Cal.Cal -e"Cal Setup 1.10.1-x64.exe" /SRelated guide: How to use winget: install and update apps
Information
- Publisher
- Cal
- Category
- Project management
- Licence
- AGPL-3.0
- Price
- Free
- Source code
- github.com/calcom/cal.diy
- Written in
- TypeScript
- Requires
- Windows 11 / 10
- Architecture
- 64-bit
- Installer
- EXE (NSIS)
- Version
- 1.10.1
- Released
- January 18, 2026
- Added to the catalogue
- July 9, 2024
- Versions listed
- 5
- Updates / year
- 2.5
- GitHub stars
- 49,213
- GitHub forks
- 15,403
- Website
- cal.com
- winget ID
- Cal.Cal
Ratings and reviews
No reviews yet. Be the first to rate it.
Alternatives to Cal
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Frequently asked questions
Is Cal free?
Yes. Cal is open-source software under the AGPL-3.0 licence.
Is Cal safe to download?
The download comes from download.todesktop.com; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Cal with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Can Cal be installed silently?
Yes. The silent install page lists the exact command for each installer.
Does Cal run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit version through emulation.
Where can I download an older version of Cal?
The versions page lists all 5 versions with links to their official installer files, back to January 20, 2024.
Can I use Cal without administrator rights?
Yes, there is a per-user installer that does not need administrator rights.
What are alternatives to Cal?
Todoist, GanttProject, XrmToolBox, Sunsama and DooTask. The alternatives page compares them.
