# OnePreview vs md.too

The clearest difference is update cadence: OnePreview at weekly against md.too's fortnightly. On price, ads, in-app purchases and device support there is nothing between them.

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

OnePreview ships an update weekly, md.too fortnightly. The most recent releases landed on October 18, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | OnePreview | md.too |
| --- | --- | --- |
| Price | Free | Free |
| 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** | Fortnightly |
| Monetization | Free | — |
| Size | 9 MB | 2 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | iPhone, iPad, Mac | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [培克 罗](https://appshunter.io/developer/1516557687) | [Dmitry Kuznetsov](https://appshunter.io/developer/444680294) |

## 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


### md.too

[App page](https://appshunter.io/ios/app/mdtoo/id6767852877)

**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 md.too free?

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

### Do OnePreview or md.too have ads?

Neither OnePreview nor md.too shows ads.

### Which is updated more often, OnePreview or md.too?

OnePreview ships an update weekly, and md.too fortnightly. Most recently, OnePreview was updated on October 18, 2026 and md.too on October 4, 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.*