zOutline vs HiMemo2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
zOutline
This is a simple outline editor that allows for easy creation and management of hierarchical lists. It supports multiple outlines in tabs, text formatting, and various export options like HTML, RTF, and plain text. The app remembers your progress and allows sharing via email attachments.
- Simple tap and gesture controls
- Multiple outlines in tabs
- Text formatting (bold, italic, underline)
- Export to HTML, RTF, and text
- Email attachment sharing
- Persistent editing state
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A straightforward, uncomplicated outline editor. You tap an item to select. You double-tap to edit an item. You swipe left on an item to delete an item.. Or you tap-and-hold to cut & paste, etc. Multiple outlines can be edited at once in different tabs. zOutline remembers what you were editing even if you kill the app. You can send outline files as email attachments, and open outline file attachments. zOutline permits export as HTML, RTF or text. Outline items can be enumerated or dotted. Items can be bold, italic, underlined. Several fonts and text colors are available.
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.
- 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
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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.
Screenshots
Verdict
The clearest difference is review sentiment: HiMemo2 at 100% against zOutline's 50%. On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
zOutline ships an update every 3 weeks, HiMemo2 monthly. The most recent releases landed on June 11, 2026 and September 10, 2026 respectively.
| Parameter | zOutline | HiMemo2 |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 weeks — better | Monthly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac, Apple Watch — better |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 1 MB | 2 MB |
| Age rating | 17+ | 4+ |
| Developer | Zack Smith | Hiroyuki Kawai |
Customer experience
zOutline
HiMemo2
In-app purchases
zOutline
No in-app purchases
HiMemo2
No in-app purchases









