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About
Aion
Terminal calendar client with vim-style keybindings Google Calendar & CalDAV. Beautiful. Fast. Keyboard-driven.
Quick Start • Keybindings • Commands • Configuration
Table of Contents
- Why Aion?
- Quick Start
- Keybindings
- Navigation
- Events
- General
- Commands
- Configuration
- Google Calendar
- CalDAV
- Theme
- Data Storage
- Tech Stack
- Roadmap
Why Aion?
Most calendar apps are mouse-driven, slow, and cluttered. Aion takes a different approach:
Vim-style navigation. Terminal-native. Zero distractions.
Comparison
| Feature | Aion | calcurse | khal | gcalcli | calcure |
|---|---|---|---|---|---|
| TUI (visual interface) | ✅ | ✅ | ❌ | ❌ | ✅ |
| Google Calendar sync | ✅ Native | ❌ | 🔧 vdirsyncer | ✅ Native | ❌ |
| CalDAV support | ✅ Native | ❌ | 🔧 vdirsyncer | ❌ | ❌ |
| Multi-account | ✅ | ❌ | 🔧 | ✅ | ❌ |
| Vim keybindings | ✅ | Partial | ❌ | ❌ | Partial |
| Multi-day view | ✅ 1/3/5 cols | ❌ | ❌ | ❌ | ❌ |
| Free/busy scheduling | ✅ | ❌ | ❌ | ✅ | ❌ |
| Google Meet generation | ✅ | ❌ | ❌ | ❌ | ❌ |
| Natural language input | ✅ | ❌ | ❌ | ❌ | ❌ |
| Event search | ✅ | ✅ | ✅ | ✅ | ❌ |
| Recurring events | ✅ | ✅ | ✅ | ✅ | ✅ |
| Timezone support | ✅ | ✅ | ✅ | ✅ | ❌ |
| Theming | ✅ TOML | ✅ | ✅ | ❌ | ✅ |
| Offline mode | ✅ SQLite | ✅ | ✅ | ❌ | ✅ |
| Dependencies | None | ncurses | Python | Python | Python |
🔧 = Requires additional setup/tools
TL;DR: Aion is the only terminal calendar with native Google Calendar sync, CalDAV support, multi-account support, Meet link generation, free/busy scheduling, and a proper visual TUI — all in one package.
Features
Don't lose this
Three weeks from now, you'll want Aion again. Will you remember where to find it?
Save it to your library and the next time you need Aion, it’s one tap away — from any AI app you use. Group it into a bench with the rest of the team for that kind of task and you can pull the whole stack at once.
⚡ Pro tip for geeks: add a-gnt 🤵🏻♂️ as a custom connector in Claude or a custom GPT in ChatGPT — one click and your library is right there in the chat. Or, if you’re in an editor, install the a-gnt MCP server and say “use my [bench name]” in Claude Code, Cursor, VS Code, or Windsurf.
a-gnt's Take
Our honest review
This plugs directly into your AI and gives it new abilities it didn't have before. A keyboard-first terminal UI for Google Calendar. Once connected, just ask your AI to use it. It's completely free and works across most major AI apps. This one just landed in the catalog — worth trying while it's fresh.
Tips for getting started
Tap "Get" above, pick your AI app, and follow the steps. Most installs take under 30 seconds.
You'll sign in with your existing account the first time. After that, it just works.
What's New
Imported from GitHub
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