# HTML Reader Offline vs OneOpen

The clearest difference is in-app purchases: OneOpen at none against HTML Reader Offline's 1. OneOpen also leads on update cadence (every 9 days vs every 6 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. HTML Reader Offline sells 1 one-off in-app purchase. OneOpen asks for nothing beyond the download.

HTML Reader Offline ships an update every 6 weeks, OneOpen every 9 days. The most recent releases landed on October 6, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | HTML Reader Offline | OneOpen |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/html-reader-offline/id6778323048/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | — |
| Size | 2 MB | 21 MB |
| Requires iOS | **16** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [发达 陈](https://appshunter.io/developer/6776674425) | [Freedom Dimension (shenzhen) Technology Co., Ltd](https://appshunter.io/developer/6776064465) |

## What reviewers say

### HTML Reader Offline

[App page](https://appshunter.io/ios/app/html-reader-offline/id6778323048)

This app allows users to read local HTML and ZIP files offline. It's designed for developers, students, and learners to access documentation and course materials on their devices without an internet connection. Features include smart ZIP support, a built-in reader, table of contents, bookmarks, and reading progress tracking.

**Highlights:** Offline HTML and ZIP file reading, Smart ZIP support with index.html detection, Built-in WKWebView reader, Auto-generated table of contents, Bookmarks and reading progress saving, Light, Dark, and Auto themes, Long-image export

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| A Cup of Coffee | $0.99 | one-time |


### OneOpen

[App page](https://appshunter.io/ios/app/oneopen-file-viewer/id6792251542)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is HTML Reader Offline free?

HTML Reader Offline is free to download, with in-app purchases available.

### Is OneOpen free?

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

### Do HTML Reader Offline or OneOpen have ads?

Neither HTML Reader Offline nor OneOpen shows ads.

### Which is updated more often, HTML Reader Offline or OneOpen?

HTML Reader Offline ships an update every 6 weeks, and OneOpen every 9 days. Most recently, HTML Reader Offline was updated on October 6, 2026 and OneOpen on October 13, 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.*