Comparison

HiMemo2 vs Kosshi Outliner

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HiMemo2

Organize information with a simple, hierarchical structure. Easily add, edit, and view data in a tree format, and export it to other apps. Syncs across Apple devices and is accessible on Apple Watch.

Highlights
  • Hierarchical data entry and management
  • Cross-device sync (iPhone, iPad, Mac)
  • Apple Watch browsing
  • Enhanced search functionality
  • Simple and intuitive UI
  • Plain text and HTML export
Features
Read full description

An enhanced version of HiMemo, an easy and convenient hierarchical memo app, is now available! For example, there is a surprising amount of information that has a hierarchical structure, such as information linked to regions and organizational charts. Normally, such information is recorded in bulleted list format in the memo app, but adding or editing information is surprisingly troublesome. Inadvertently, problems such as breaking the hierarchical relationship will occur. With HiMemo2, information can be recorded hierarchically with a simple operation like bulleted list format, and it is easy to add or modify. It is also possible to display a tree that gives a bird's-eye view of the whole, and to export information to other apps and SNS in plain text format or HTML format. Features of HiMemo2. - You can easily enter and manage data with a hierarchical structure. - Share data between multiple iPhones, iPads, Macs (sync with the same Apple ID). - You can browse the data on your Apple Watch. The following functions have been enhanced and improved from HiMemo. - Data is synchronized with HiMemo. - Linked with Apple Watch. You can browse the data on your Apple Watch. - The search function has been enhanced, and you can now search across memos. - The UI is simpler and easier to understand. Data will be inherited from HiMemo, so if you are using iOS 15 or later, we recommend migrating to HiMemo2.

About

Kosshi Outliner

This native outliner app allows you to organize thoughts with a hierarchical structure, zoom into specific sections, and format text using Markdown. It supports images, sketches, internal links, and reminders, with seamless iCloud sync across Apple devices.

Highlights
  • Hierarchical outlining with indentation
  • Zoom into specific rows
  • Markdown formatting
  • Image and file embedding
  • Apple Pencil sketches
  • Internal linking
  • Reminders and calendar sync
Features
Read full description

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.

Screenshots

HiMemo24 screens
Kosshi Outliner4 screens

Verdict

The call

The clearest difference is in-app purchases: HiMemo2 at none against Kosshi Outliner's 1. Kosshi Outliner's advantage is update cadence (every 3 days vs monthly) and iOS requirement (17.0 vs 26.0). On price, review sentiment, ads and monetization model there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Kosshi Outliner sells 1 one-off in-app purchase. HiMemo2 asks for nothing beyond the download.

UpkeepUpdate frequency

HiMemo2 ships an update monthly, Kosshi Outliner every 3 days. The most recent releases landed on October 15, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 7 level
HiMemo2 versus Kosshi Outliner: the parameters behind the verdict, then further details
ParameterHiMemo2Kosshi Outliner
PriceFreeFree
Rating—5.0 (4 ratings) — better
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings—4 — better
Update frequencyMonthlyEvery 3 days — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhone, iPad, Mac, Apple Watch — betteriPhone, iPad, Mac
Requires iOS26.017.0 — better
Further details — not scored
Size5 MB30 MB
Age rating4+4+
DeveloperHiroyuki KawaiJunichi Sato

Customer experience

HiMemo2

Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Kosshi Outliner

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

HiMemo2

No in-app purchases

1 purchases

Kosshi Outliner

One-time1
  • Kosshi Outliner$24.99

Questions

Is HiMemo2 free?
HiMemo2 is free to download, with no in-app purchases.
Is Kosshi Outliner free?
Kosshi Outliner is free to download, with in-app purchases available.
Do HiMemo2 or Kosshi Outliner have ads?
Neither HiMemo2 nor Kosshi Outliner shows ads.
Which is updated more often, HiMemo2 or Kosshi Outliner?
HiMemo2 ships an update monthly, and Kosshi Outliner every 3 days. Most recently, HiMemo2 was updated on October 15, 2026 and Kosshi Outliner on October 24, 2026.

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