# OnePreview vs Markdown Viewer Editor

The clearest difference is price: OnePreview at Free against Markdown Viewer Editor's $4.99. OnePreview also leads on update cadence (weekly vs every 2 months). Markdown Viewer Editor's advantage is iOS requirement (13.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

OnePreview is free to download; Markdown Viewer Editor costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

OnePreview ships an update weekly, Markdown Viewer Editor every 2 months. The most recent releases landed on October 18, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | OnePreview | Markdown Viewer Editor |
| --- | --- | --- |
| Price | **Free** | $4.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/onepreview-file-viewer/id6760284919/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 2 months |
| Monetization | Free | — |
| Size | 9 MB | 33 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Mac | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [培克 罗](https://appshunter.io/developer/1516557687) | [Hefei Yunyilian Intelligent Technology Co., Ltd](https://appshunter.io/developer/1541792997) |

## What reviewers say

### OnePreview

[App page](https://appshunter.io/ios/app/onepreview-file-viewer/id6760284919)

This app allows you to preview and interact with various developer file formats, including Markdown, code, databases, and archives, directly on your iPhone and iPad. It offers local processing for speed and privacy, with features like PDF export and structured data inspection.

**Highlights:** Markdown and MDX rendering, JSON, YAML, XML, CSV, TSV, TOML, ENV parsing, SQLite database inspection, Source code and log viewing, ZIP and TAR.GZ archive content preview, Mermaid diagrams and KaTeX math rendering, A4 PDF export for Markdown files

**Features:** Vision Pro support

**In-app purchases:** none


### Markdown Viewer Editor

[App page](https://appshunter.io/ios/app/markdown-viewer-editor/id6762539454)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is OnePreview free?

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

### Is Markdown Viewer Editor free?

Markdown Viewer Editor costs $4.99, with no in-app purchases.

### Do OnePreview or Markdown Viewer Editor have ads?

Neither OnePreview nor Markdown Viewer Editor shows ads.

### Which is updated more often, OnePreview or Markdown Viewer Editor?

OnePreview ships an update weekly, and Markdown Viewer Editor every 2 months. Most recently, OnePreview was updated on October 18, 2026 and Markdown Viewer Editor on October 17, 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.*