# PDF Watch Viewer vs AppUCAB

The clearest difference is in-app purchases: AppUCAB at none against PDF Watch Viewer's 9. AppUCAB also leads on iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. PDF Watch Viewer sells 9 in-app purchases, starting at $4.99 per 7 days. AppUCAB asks for nothing beyond the download.

PDF Watch Viewer ships an update fortnightly, AppUCAB every 3 weeks. The most recent releases landed on October 23, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | PDF Watch Viewer | AppUCAB |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (393 ratings)](https://appshunter.io/ios/app/pdf-watch-viewer-wristdocs/id6745387064/reviews)** | — |
| Number of ratings | **393** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 84 MB | 70 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ONNEX YAZILIM ANONIM SIRKETI](https://appshunter.io/developer/1856674142) | [Universidad Católica Andrés Bello](https://appshunter.io/developer/1853073225) |

## What reviewers say

### PDF Watch Viewer

[App page](https://appshunter.io/ios/app/pdf-watch-viewer-wristdocs/id6745387064)

View PDF, Word, Excel, and text files directly on your Apple Watch. Easily navigate, zoom, and organize documents for quick access on the go. Syncs seamlessly with your iPhone for offline viewing.

**Highlights:** PDF, Word, Excel, Text file support, Zoom and page navigation, Favorites and collections, Seamless iPhone sync, Offline access, Image and notes support

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Subscription | $4.99 | per 7 days |
| Weekly Subscription | $6.99 | per 7 days |
| WristDocs Six Months Premium | $9.99 | per 6 months |
| Monthly Subscription | $9.99 | per month |
| 6-Month Premium | $14.99 | per 6 months |
| Annual Subscription | $19.99 | per year |
| Annual Subscription | $29.99 | per year |
| Lifetime Access | $29.99 | one-time |
| Lifetime Premium Access | $59.99 | one-time |


### AppUCAB

[App page](https://appshunter.io/ios/app/appucab/id6758312625)

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

**In-app purchases:** none


## Frequently asked questions

### Is PDF Watch Viewer free?

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

### Is AppUCAB free?

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

### Do PDF Watch Viewer or AppUCAB have ads?

Neither PDF Watch Viewer nor AppUCAB shows ads.

### Which is updated more often, PDF Watch Viewer or AppUCAB?

PDF Watch Viewer ships an update fortnightly, and AppUCAB every 3 weeks. Most recently, PDF Watch Viewer was updated on October 23, 2026 and AppUCAB on October 6, 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.*