head to head · open source
operating-system vs calendar-card-pro
operating-system has 7,564 GitHub stars, 1,319 forks, 95 open issues and last shipped yesterday. calendar-card-pro has 1,231 stars, 103 forks, 51 open issues and last shipped 2 days ago. operating-system leads on adoption by 514% (7,564 vs 1,231 stars). operating-system is written in Python under Apache-2.0; calendar-card-pro is written in TypeScript under MIT. operating-system has attracted 17% as many forks as stars, calendar-card-pro 8%. operating-system was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 1 topic tag (home-assistant), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| operating-system | calendar-card-pro | |
|---|---|---|
| GitHub stars | ★ 7.6K | ★ 1.2K |
| License | Apache-2.0 | MIT |
| Written in | Python | TypeScript |
| Last push | 2026-10-26 | 2026-10-25 |
| Forks | ⑂ 1.3K | ⑂ 103 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick operating-system if
- You weight community size — 7.6K stars and counting
- You want the Apache-2.0 license terms
- Your stack matches Python
- You value the larger contributor base for long-term maintenance
pick calendar-card-pro if
- You want the calendar-card-pro feature set and don't need the biggest community
- You prefer the MIT license terms
- Your stack matches TypeScript
- You evaluated both and calendar-card-pro fits your workflow better
About operating-system
Home Assistant Operating System Home Assistant Operating System (formerly HassOS) is a Linux based operating system optimized to host Home Assistant and its Apps. Home Assistant Operating System uses Docker as its container engine. By default it deploys the Home Assistant Supervisor as a container. Home Assistant Supervisor in turn uses the Docker container engine to control Home Assistant Core and Apps in separate containers. Home Assistant Operating System is not based on a regular Linux distribution like Ubuntu. It is built using Buildroot and it is optimized to run Home Assistant. It targets single board…
read the full operating-system overview →
About calendar-card-pro
Calendar Card Pro for Home Assistant [![hacs][hacs img]][hacs url] [![GitHub Release][github release img]][github release url] [![Downloads][github downloads img]][github release url] [![Downloads@latest][github latest downloads img]][github release url] ☕ Support This Project If you find Calendar Card Pro useful, consider supporting its development: 📖 Documentation This README covers installation and a quick start. Everything else — every configuration option, all features and worked examples — lives on the documentation site , which is searchable and always matches the latest release. 1️⃣ Overview 🔍 About…
read the full calendar-card-pro overview →
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Frequently asked questions
Is operating-system or calendar-card-pro more popular?
operating-system has 7,564 GitHub stars and calendar-card-pro has 1,231. operating-system has the larger community by that measure.
Are operating-system and calendar-card-pro free?
Both are open source. operating-system is licensed under Apache-2.0 and calendar-card-pro under MIT. Neither carries a licence fee.
What is the difference between operating-system and calendar-card-pro?
operating-system is written in Python and calendar-card-pro in TypeScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, operating-system or calendar-card-pro?
Choose operating-system if you want the larger community (7,564 stars) or its Apache-2.0 licence terms. Choose calendar-card-pro if its feature set, stack or MIT licence fits better. Both are self-hostable.