# Cart Sample App vs Winmail Viewer

The clearest difference is in-app purchases: Cart Sample App at none against Winmail Viewer's 4. Winmail Viewer's advantage is update cadence (every 9 days vs every 6 months) and device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. Winmail Viewer sells 4 in-app purchases, starting at $1.99 per month. Cart Sample App asks for nothing beyond the download.

Cart Sample App ships an update every 6 months, Winmail Viewer every 9 days. The most recent releases landed on October 30, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Cart Sample App | Winmail Viewer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.8 (20 ratings)](https://appshunter.io/ios/app/winmail-viewer-dat-opener/id6752894720/reviews)** |
| Number of ratings | — | **20** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 9 days** |
| Monetization | — | Freemium |
| Size | 2 MB | 25 MB |
| Requires iOS | 18.0 | **17** |
| Devices | iPhone | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Michael Kofler](https://appshunter.io/developer/984981220) | [Beijing Danbao Intelligent Technology Co., Ltd](https://appshunter.io/developer/1833168926) |

## What reviewers say

### Cart Sample App

[App page](https://appshunter.io/ios/app/cart-sample-app/id6744360009)

**Features:** macOS Compatibility

**In-app purchases:** none


### Winmail Viewer

[App page](https://appshunter.io/ios/app/winmail-viewer-dat-opener/id6752894720)

Effortlessly open and view various email attachment formats, including Winmail.dat and MSG files. Extract embedded documents and images, and manage your files with integrated storage. Supports a wide range of email and document types for seamless access.

**Highlights:** Open Winmail.dat, MSG, OFT, XPS/OXPS, and EML files, Extract attachments like PDFs and Office documents, View formatted messages with original layout, Search messages by subject, sender, or keyword, Save and organize files with SwiftData storage, Dark Mode support, iOS Files app integration

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $1.99 | per month |
| Premium Weekly | $1.99 | per 7 days |
| Premium Yearly | $5.99 | per year |
| Lifetime Premium Access | $9.99 | one-time |


## Frequently asked questions

### Is Cart Sample App free?

Cart Sample App is free to download, with no in-app purchases.

### Is Winmail Viewer free?

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

### Do Cart Sample App or Winmail Viewer have ads?

Neither Cart Sample App nor Winmail Viewer shows ads.

### Which is updated more often, Cart Sample App or Winmail Viewer?

Cart Sample App ships an update every 6 months, and Winmail Viewer every 9 days. Most recently, Cart Sample App was updated on October 30, 2026 and Winmail Viewer on November 5, 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.*