A fast, native outliner. Now smooth on large outlines, with refined keyboard shortcuts. Markdown, images, iCloud sync. One-time purchase.
Kosshi is a fast, native outliner. Simple and smooth on large outlines.
Available on Mac, iPhone, and iPad — one purchase covers all three.
Outliner
Hit Tab to indent and build a hierarchy. Collapse what you don't need, drag to move things around.
Zoom In / Zoom Out
Zoom into any row and only its contents are shown. Breadcrumbs tell you where you are, and you can jump home anytime.
Markdown
Bold, italic, highlight, links, checkboxes, code blocks, and LaTeX math all render right where you type. Formatting markers only appear while editing — move away and they're gone.
Images & Files
Add images by pasting or dragging, and resize however you want. PDFs and videos show as inline previews too.
Apple Pencil Sketches
Draw sketches with Apple Pencil on iPad. They sync to Mac and iPhone through iCloud.
Search
Cmd+F to search your whole outline. Matches get highlighted. Replace works too.
Dark Mode
Switch between light and dark themes. Automatically follows your system setting.
Tags
Use #tags to categorize and @tags for dates or status. Filter from the sidebar.
Internal Links
Type [[ to search and link to another row. Build a web of connected outlines.
Bookmarks
Press Cmd+D to bookmark a row. Bookmarks appear at the top of the sidebar.
Prose Mode
Switch a row to Prose Mode for long-form writing. Bullets disappear and children stay expanded.
Reminders & Calendar
Any @tag with a date syncs to Apple Reminders or Calendar. Use @todo(3/15), @meeting(every monday 10:00), and so on.
Keyboard Shortcuts
Collapse, move, indent — all without reaching for the mouse.
Export
Export as Markdown, OPML, or plain text. Your data is never locked in.
Auto Backup
Restore past outlines from daily backups. Feel free to delete outlines you no longer need.
iCloud Sync
When iCloud is available, your outlines sync across Apple devices via CloudKit. Data is stored in your iCloud account, and the developer cannot access its contents.
Pay Once
Built natively for speed. Launches quickly and works offline. One-time purchase covers Mac, iPhone, and iPad — no subscription, no account required. A 7-day free trial is available.
Feedback
Feature requests and bug reports are always welcome. Reach us via the contact form at https://kosshi.app/contact or on X at @shirokumamake.
This app hasn’t received enough ratings or reviews to display an overview.
Excellent outliner
Matt101z
I used to use an online outliner that was subscription based and lacked end-to-end encryption, which I was never very happy about. It was great to find this app that supports huge outlines and syncs fast over iCloud between devices and is a one-time purchase. Thank you!
Small improvements and bug fixes.
- OPML import now preserves completion state from WorkFlowy and Dynalist OPML exports
- Fixed missing #tag / @tag prefix on parent rows in the sidebar
- Fixed @tag parsing for tag kinds with non-ASCII characters
- Fixed duplicate inserts when using Expand All
Version 1.10.1
The developer, Junichi Sato, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Privacy practices may vary, for example, based on the features you use or your age. Learn More
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
Seller
Junichi Sato
Size
16.4 MB
Category
Productivity
Compatibility
Requires iOS 17.0 or later.
iPhone Requires iOS 17.0 or later.
iPad Requires iPadOS 17.0 or later.
Mac Requires macOS 14.0 or later.
Apple Vision Requires visionOS 1.0 or later.
Languages
English and 8 more
English, French, German, Italian, Japanese, Korean, Simplified Chinese, Spanish, Traditional Chinese