# Message Viewer Pro vs OnePreview

The clearest difference is price: OnePreview at Free against Message Viewer Pro's $3.99. OnePreview also leads on update cadence (every 2 weeks vs monthly). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

OnePreview is free to download; Message Viewer Pro costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Message Viewer Pro ships an update monthly, OnePreview every 2 weeks. The most recent releases landed on September 17, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | Message Viewer Pro | OnePreview |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/message-viewer-pro/id6740704561/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | Paid | — |
| Size | 9 MB | 8 MB |
| Requires iOS | **16.6** | 17.0 |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Matrix Logic Corporation](https://appshunter.io/developer/303074412) | [培克 罗](https://appshunter.io/developer/1516557687) |

## What reviewers say

### Message Viewer Pro

[App page](https://appshunter.io/ios/app/message-viewer-pro/id6740704561)

Easily view EML and MSG email files, including attachments, directly on your iOS or macOS device. Share or print attachments, or compose new emails using the content of your saved messages.

**Highlights:** View EML and MSG files, Access attachments, Share attachments, Print attachments, Compose new emails from viewed messages

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

**In-app purchases:** none


### OnePreview

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

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Message Viewer Pro free?

Message Viewer Pro costs $3.99, with no in-app purchases.

### Is OnePreview free?

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

### Do Message Viewer Pro or OnePreview have ads?

Neither Message Viewer Pro nor OnePreview shows ads.

### Which is updated more often, Message Viewer Pro or OnePreview?

Message Viewer Pro ships an update monthly, and OnePreview every 2 weeks. Most recently, Message Viewer Pro was updated on September 17, 2026 and OnePreview on September 11, 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.*