# zOutline vs Tree Notebook

The clearest difference is rating: zOutline at 5.0 against Tree Notebook's 4.4. zOutline also leads on update cadence (every 3 weeks vs every 25 months). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

zOutline holds the better App Store score, 5.0 against 4.4. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

zOutline ships an update every 3 weeks, Tree Notebook every 25 months. The most recent releases landed on June 11, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | zOutline | Tree Notebook |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/zoutline/id1179222435/reviews)** | [4.4 (5 ratings)](https://appshunter.io/ios/app/tree-notebook/id1335136945/reviews) |
| Number of ratings | 2 | **5** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 25 months |
| Monetization | Free | Free |
| Size | 1 MB | 12 MB |
| Requires iOS | 15.6 | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Zack Smith](https://appshunter.io/developer/388860537) | [Elena Pankratova](https://appshunter.io/developer/390058763) |

## What reviewers say

### zOutline

[App page](https://appshunter.io/ios/app/zoutline/id1179222435)

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.

**Highlights:** 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

**Features:** macOS Compatibility

**In-app purchases:** none


### Tree Notebook

[App page](https://appshunter.io/ios/app/tree-notebook/id1335136945)

Organize personal information with a hierarchical notes manager. Structure data into a tree-like hierarchy of folders and notes, with options for public and encrypted private sections. Features include powerful search, customizable item appearance, and event reminders.

**Highlights:** Tree-like hierarchical organization, Public and encrypted private data sections, Attachments (images, files), Multiple data views (tree, list, favorites, history), Powerful search capabilities, Customizable item appearance, Event reminders and calendar

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is zOutline free?

zOutline is free to download, with no in-app purchases.

### Is Tree Notebook free?

Tree Notebook is free to download, with no in-app purchases.

### Which has better reviews, zOutline or Tree Notebook?

zOutline is rated higher. zOutline averages 5.0 out of 5 from 2 ratings, while Tree Notebook averages 4.4 from 5 ratings.

### Do zOutline or Tree Notebook have ads?

Neither zOutline nor Tree Notebook shows ads.

### Which is updated more often, zOutline or Tree Notebook?

zOutline ships an update every 3 weeks, and Tree Notebook every 25 months. Most recently, zOutline was updated on June 11, 2026 and Tree Notebook on September 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*