# 電気系資格 統合版 vs Message Viewer Pro

The clearest difference is update cadence: Message Viewer Pro at monthly against 電気系資格 統合版's every 29 months. Message Viewer Pro also leads on price ($3.99 vs $4.99). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

電気系資格 統合版 costs $4.99 and Message Viewer Pro $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

電気系資格 統合版 ships an update every 29 months, Message Viewer Pro monthly. The most recent releases landed on September 21, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | 電気系資格 統合版 | Message Viewer Pro |
| --- | --- | --- |
| Price | $4.99 | **$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 | Every 29 months | **Monthly** |
| Monetization | — | Paid |
| Size | 73 MB | 9 MB |
| Requires iOS | **15.0** | 16.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [harada keiko](https://appshunter.io/developer/1457179049) | [Matrix Logic Corporation](https://appshunter.io/developer/303074412) |

## What reviewers say

### 電気系資格 統合版

[App page](https://appshunter.io/ios/app/id1479263441)

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

**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 電気系資格 統合版 free?

電気系資格 統合版 costs $4.99, with no in-app purchases.

### Is Message Viewer Pro free?

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

### Do 電気系資格 統合版 or Message Viewer Pro have ads?

Neither 電気系資格 統合版 nor Message Viewer Pro shows ads.

### Which is updated more often, 電気系資格 統合版 or Message Viewer Pro?

電気系資格 統合版 ships an update every 29 months, and Message Viewer Pro monthly. Most recently, 電気系資格 統合版 was updated on September 21, 2026 and Message Viewer Pro on September 17, 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.*