blueMaster check vs Message Viewer Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
blueMaster check
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The blueMaster check is designed as a control unit for tool connectors to check the internal wiring.
Message Viewer Pro
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.
- View EML and MSG files
- Access attachments
- Share attachments
- Print attachments
- Compose new emails from viewed messages
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View both EML and MSG (Outlook) files on your iOS/macOS device, including attachments within them. These are usually emails saved in the EML or MSG format. Tap on an EML or MSG file in another app, "Open In..." and select Message Viewer to view your saved email. You may tap "open a sample EML" to see an example email open up. Attachments may be shared with other apps or printed. Tap the compose icon to open your EML/MSG as a new Mail message.
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | blueMaster check | Message Viewer Pro |
|---|---|---|
| Price | Free — better | $3.99 |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Monthly — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Paid |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.5 — better | 17.0 |
| Further details — not scored | ||
| Size | 46 MB | 15 MB |
| Age rating | 4+ | 4+ |
| Developer | ESYS Gesellschaft fuer Elektronische Systemtechnik . Hard- und Software mbH | Matrix Logic Corporation |
In-app purchases
blueMaster check
No in-app purchases
Message Viewer Pro
No in-app purchases
Questions
Is blueMaster check free?
Is Message Viewer Pro free?
Do blueMaster check or Message Viewer Pro have ads?
Which is updated more often, blueMaster check or Message Viewer Pro?
Other comparisons
