# Message Viewer Pro vs Compound Calculator

The clearest difference is in-app purchases: Message Viewer Pro at none against Compound Calculator's 3. Compound Calculator's advantage is update cadence (every 5 days vs monthly) and price ($0.99 vs $3.99). On ads, device support and iOS requirement there is nothing between them.

Message Viewer Pro costs $3.99 and Compound Calculator $0.99 up front. Compound Calculator sells 3 in-app purchases, starting at $2.99 per month. Message Viewer Pro asks for nothing beyond the download.

Message Viewer Pro ships an update monthly, Compound Calculator every 5 days. The most recent releases landed on October 24, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Message Viewer Pro | Compound Calculator |
| --- | --- | --- |
| Price | $3.99 | **$0.99** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/message-viewer-pro/id6740704561/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 5 days** |
| Monetization | Paid | — |
| Size | 15 MB | 5 MB |
| Requires iOS | **17.0** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Matrix Logic Corporation](https://appshunter.io/developer/303074412) | [乐祥 胡](https://appshunter.io/developer/1572365721) |

## 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


### Compound Calculator

[App page](https://appshunter.io/ios/app/compound-calculator-lite/id6749442265)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Compound Calculator - Pro 30days | $2.99 | per month |
| Compound Calculator - Pro 360days | $14.99 | per year |
| Compound Calculator Pro - lifetime | $19.99 | one-time |


## Frequently asked questions

### Is Message Viewer Pro free?

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

### Is Compound Calculator free?

Compound Calculator costs $0.99, and also offers in-app purchases.

### Do Message Viewer Pro or Compound Calculator have ads?

Neither Message Viewer Pro nor Compound Calculator shows ads.

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

Message Viewer Pro ships an update monthly, and Compound Calculator every 5 days. Most recently, Message Viewer Pro was updated on October 24, 2026 and Compound Calculator on October 28, 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.*