# blueMaster check vs Message Viewer Pro

The clearest difference is price: blueMaster check at Free against Message Viewer Pro's $3.99. blueMaster check also leads on iOS requirement (15.5 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

blueMaster check 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.

blueMaster check ships an update monthly, Message Viewer Pro every 5 weeks. The most recent releases landed on October 11, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | blueMaster check | Message Viewer Pro |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| 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 5 weeks |
| Monetization | — | Paid |
| Size | 46 MB | 15 MB |
| Requires iOS | **15.5** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ESYS Gesellschaft fuer Elektronische Systemtechnik . Hard- und Software mbH](https://appshunter.io/developer/917295043) | [Matrix Logic Corporation](https://appshunter.io/developer/303074412) |

## What reviewers say

### blueMaster check

[App page](https://appshunter.io/ios/app/bluemaster-check/id6476186617)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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


## Frequently asked questions

### Is blueMaster check free?

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

### Is Message Viewer Pro free?

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

### Do blueMaster check or Message Viewer Pro have ads?

Neither blueMaster check nor Message Viewer Pro shows ads.

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

blueMaster check ships an update monthly, and Message Viewer Pro every 5 weeks. Most recently, blueMaster check was updated on October 11, 2026 and Message Viewer Pro on October 5, 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.*