# CHMOD Lab vs Winmail.dat Opener · Viewer

The clearest difference is in-app purchases: CHMOD Lab at none against Winmail.dat Opener · Viewer's 3. Winmail.dat Opener · Viewer's advantage is ratings volume (6 vs 1). On price, rating, ads and device support there is nothing between them.

Both are free to download. Winmail.dat Opener · Viewer sells 3 in-app purchases, starting at $1.99 per 7 days. CHMOD Lab asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for CHMOD Lab against 5.0 for Winmail.dat Opener · Viewer. That said, the two scores are not equally well evidenced: Winmail.dat Opener · Viewer has 6 ratings behind it against 1, so its average is the more settled of the two.

## The numbers

| Metric | CHMOD Lab | Winmail.dat Opener · Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/chmod-lab-linux-permissions/id6757230787/reviews) | [5.0 (6 ratings)](https://appshunter.io/ios/app/winmaildat-opener-viewer/id6758431753/reviews) |
| Number of ratings | 1 | **6** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 9 days |
| Monetization | **Free** | Paid |
| Size | 2 MB | 16 MB |
| Requires iOS | 17.6 | **17** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Guy Miller](https://appshunter.io/developer/1865478036) | [延平 陈](https://appshunter.io/developer/1833168926) |

## What reviewers say

### CHMOD Lab

[App page](https://appshunter.io/ios/app/chmod-lab-linux-permissions/id6757230787)

This app provides an interactive sandbox and calculator to help users understand and manage Linux file permissions. It bridges the gap between octal and symbolic notation with real-time updates and visual representations.

**Highlights:** Interactive permission calculator, Real-time octal and symbolic code updates, Reverse lookup for permission codes, Visual permission sandbox, Built-in cheat sheets

**Features:** macOS Compatibility

**In-app purchases:** none


### Winmail.dat Opener · Viewer

[App page](https://appshunter.io/ios/app/winmaildat-opener-viewer/id6758431753)

Easily open and extract attachments from Winmail.dat, .msg, and .oft email files directly on your device. This utility offers a private, offline solution with a one-time purchase, ensuring your data never leaves your phone.

**Highlights:** Open winmail.dat (TNEF) files, Open Outlook .msg and .oft files, Extract attachments (photos, PDFs, Word, Excel), 100% on-device processing, One-time purchase, no subscriptions, Supports Dark Mode and Drag & Drop

**Features:** Family Sharing, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $1.99 | per 7 days |
| Premium Yearly | $12.99 | per year |
| Winmail Opener Pro | $19.99 | one-time |


## Frequently asked questions

### Is CHMOD Lab free?

CHMOD Lab is free to download, with no in-app purchases.

### Is Winmail.dat Opener · Viewer free?

Winmail.dat Opener · Viewer is free to download, with in-app purchases available.

### Which has better reviews, CHMOD Lab or Winmail.dat Opener · Viewer?

CHMOD Lab and Winmail.dat Opener · Viewer are both rated 5.0 out of 5 on the App Store, from 1 and 6 ratings respectively.

### Do CHMOD Lab or Winmail.dat Opener · Viewer have ads?

Neither CHMOD Lab nor Winmail.dat Opener · Viewer shows ads.

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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.*