# OnePreview vs Wivlo

The clearest difference is update cadence: Wivlo at every 4 days against OnePreview's every 8 days. Wivlo also leads on iOS requirement (15.1 vs 17.0). 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 every 8 days, Wivlo every 4 days. The most recent releases landed on October 15, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | OnePreview | Wivlo |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/onepreview/id6760284919/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 4 days** |
| Monetization | Free | — |
| Size | 9 MB | 37 MB |
| Requires iOS | 17.0 | **15.1** |
| Devices | **iPhone, iPad, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [培克 罗](https://appshunter.io/developer/1516557687) | [YOHAN KIM](https://appshunter.io/developer/1845523637) |

## What reviewers say

### OnePreview

[App page](https://appshunter.io/ios/app/onepreview/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


### Wivlo

[App page](https://appshunter.io/ios/app/wivlo/id6785180543)

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

**In-app purchases:** none


## Frequently asked questions

### Is OnePreview free?

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

### Is Wivlo free?

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

### Do OnePreview or Wivlo have ads?

Neither OnePreview nor Wivlo shows ads.

### Which is updated more often, OnePreview or Wivlo?

OnePreview ships an update every 8 days, and Wivlo every 4 days. Most recently, OnePreview was updated on October 15, 2026 and Wivlo on October 2, 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.*