Bring order from chaos.
A local-first scheduling app built on OpenTime—the human-readable format that makes your schedule as portable as your notes.
Windows, Android, and Linux coming soon
Markdown for your calendar.
OpenTime is a plain-text format for goals, tasks, habits, reminders, events, and appointments. Like Markdown made your notes portable, OpenTime makes your schedule portable.
It's YAML you can read. Files you can version control. Data you actually own.
opentime_version: "0.2"
items:
- id: goal-1
type: goal
title: "Finish Novel Draft"
target_date: 2026-06-30
progress: 0.35
tags: [writing, creative]
- id: task-1
type: task
title: "Write chapter outline"
status: in_progress
due: "2026-01-15"
goal_id: goal-1
Your app, your way
Built for your knowledge workflow.
Elysium integrates deeply with Obsidian—your tasks, events, and time blocks flow seamlessly between your vault and your schedule.
Tasks Plugin Support
Parses emoji dates from the Tasks plugin. 📅 due dates, ⏳ scheduled, 🛫 start dates.
Day Planner Format
Time blocks like "09:00 - 12:00 Deep work" sync automatically to your schedule.
YAML Frontmatter
Extract scheduled dates, due dates, and metadata from your note frontmatter.
Auto-Export on Save
Changes in Obsidian sync to Elysium automatically when you save.
Jump to Source
Click any item in Elysium to open the original note in Obsidian instantly.
Extension Fields
x_obsidian tracks vault_name, source_file, and line_number for perfect round-trips.
- type: task
id: task_from_obsidian
title: "Review project notes"
status: todo
x_obsidian:
vault_name: "My Vault"
source_file: "Projects/Q1 Planning.md"
line_number: 42
x_elysium:
synced_at: "2026-01-02T10:30:00Z"One format. Every kind of schedule.
Most apps force you to choose: tasks OR calendar OR habits. OpenTime unifies them—six types that compose into any workflow you need.
Goals
Outcomes with deadlines and progress
Tasks
Actions that need to get done
Habits
Recurring behaviors with streaks
Reminders
Time-triggered notifications
Events
Blocks of time on your calendar
Appointments
Events with attendees
Odysseys
Containers that hold any combination. A client engagement. A product launch. A semester of study. Your structure, not ours.
Extend it. Automate it. Make it yours.
Community Plugins
Browse and install plugins that add new features, integrations, and views.
Shortcuts Integration
Build automations with Apple Shortcuts. Trigger actions, query your schedule, create items.
App Launcher
Launch apps directly from schedule items. Open Figma for design work. VS Code for coding.
Native on Apple platforms.
Built in Swift for native performance. No Electron. Your schedule loads instantly, syncs locally first, and respects your system settings.
Built by one developer who needed it to exist.
Elysium isn't backed by investors or built by a committee. It's built by someone who uses it every day and will keep it alive because they need it.
And because your schedule lives in OpenTime—an open format you can read, edit, and move anywhere—you're never locked in. Even if I disappear tomorrow, your data doesn't.