# zOutline vs HarborKeep

The clearest difference is in-app purchases: zOutline at none against HarborKeep's 1. zOutline also leads on iOS requirement (15.6 vs 18.6). On price, rating, ratings volume and update cadence there is nothing between them.

Both are free to download. HarborKeep sells 1 one-off in-app purchase. zOutline asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for zOutline against 5.0 for HarborKeep. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

zOutline ships an update every 3 weeks, HarborKeep every 2 weeks. The most recent releases landed on October 1, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | zOutline | HarborKeep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/zoutline/id1179222435/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/harborkeep/id6742726120/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 1 MB | 24 MB |
| Requires iOS | **15.6** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Zack Smith](https://appshunter.io/developer/388860537) | [C. Ray Carroll LLC](https://appshunter.io/developer/1794874509) |

## 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


### HarborKeep

[App page](https://appshunter.io/ios/app/harborkeep/id6742726120)

Organize critical family information, including medical records, legal documents, and emergency contacts, in a secure private vault. Easily store notes, photos, and files, and access them quickly when needed. Information is protected on your device and can sync across Apple devices via iCloud.

**Highlights:** Private life vault, Family records organization, Emergency information storage, Medical notes and insurance details, Secure notes and login details, Attach documents and images, Sync across Apple devices via iCloud

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Secure Import & Export | $3.99 | one-time |


## Frequently asked questions

### Is zOutline free?

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

### Is HarborKeep free?

HarborKeep is free to download, with in-app purchases available.

### Which has better reviews, zOutline or HarborKeep?

zOutline and HarborKeep are both rated 5.0 out of 5 on the App Store, from 2 and 1 ratings respectively.

### Do zOutline or HarborKeep have ads?

Neither zOutline nor HarborKeep shows ads.

### Which is updated more often, zOutline or HarborKeep?

zOutline ships an update every 3 weeks, and HarborKeep every 2 weeks. Most recently, zOutline was updated on October 1, 2026 and HarborKeep on October 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.*