# Operational Data vs MBOX Viewer · Mail File Reader

The clearest difference is in-app purchases: Operational Data at none against MBOX Viewer · Mail File Reader's 3. Operational Data also leads on ads (none vs shown). MBOX Viewer · Mail File Reader's advantage is update cadence (every 8 days vs every 21 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. MBOX Viewer · Mail File Reader sells 3 in-app purchases, starting at $6.99 per 7 days. Operational Data asks for nothing beyond the download.

Operational Data ships an update every 21 months, MBOX Viewer · Mail File Reader every 8 days. The most recent releases landed on September 23, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Operational Data | MBOX Viewer · Mail File Reader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/mbox-viewer-mail-file-reader/id6760363352/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 21 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 97 MB | 26 MB |
| Requires iOS | **14.2** | 15.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Recy Systems AG](https://appshunter.io/developer/943039302) | [OMER FARUK KIZILTUG](https://appshunter.io/developer/1870337585) |

## What reviewers say

### Operational Data

[App page](https://appshunter.io/ios/app/operational-data/id1554827568)

**In-app purchases:** none


### MBOX Viewer · Mail File Reader

[App page](https://appshunter.io/ios/app/mbox-viewer-mail-file-reader/id6760363352)

This application allows you to open and read large MBOX and EML email files directly on your device. It offers robust search capabilities, an attachment gallery, and export options to various formats, with advanced features available via a PRO upgrade.

**Highlights:** Open MBOX and EML files offline, Handles large file sizes (250GB+), Attachment gallery, Detailed and basic search, Export to PDF, EML, HTML, Salt-Text, Forensic analysis tools, Bates-numbered PDF generation

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly Plan | $6.99 | per 7 days |
| Premium Annual Subscription | $49.99 | per year |
| Lifetime Premium Access | $119.99 | one-time |


## Frequently asked questions

### Is Operational Data free?

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

### Is MBOX Viewer · Mail File Reader free?

MBOX Viewer · Mail File Reader is free to download, with in-app purchases available.

### Do Operational Data or MBOX Viewer · Mail File Reader have ads?

MBOX Viewer · Mail File Reader shows ads; Operational Data does not.

### Which is updated more often, Operational Data or MBOX Viewer · Mail File Reader?

Operational Data ships an update every 21 months, and MBOX Viewer · Mail File Reader every 8 days. Most recently, Operational Data was updated on September 23, 2026 and MBOX Viewer · Mail File Reader on September 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*