# SkyDRM vs PDF Watermark Expert

The clearest difference is in-app purchases: SkyDRM at none against PDF Watermark Expert's 3. SkyDRM also leads on ads (none vs shown) and ratings volume (4 vs 1). On price, rating, update cadence and device support there is nothing between them.

Both are free to download. PDF Watermark Expert sells 3 in-app purchases, starting at $2.99 per 7 days. SkyDRM asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for SkyDRM against 5.0 for PDF Watermark Expert. Both are backed by a comparable volume of ratings — 4 and 1 respectively.

SkyDRM ships an update every 3 months, PDF Watermark Expert every 4 months. The most recent releases landed on October 6, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | SkyDRM | PDF Watermark Expert |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (4 ratings)](https://appshunter.io/ios/app/skydrm/id1148196131/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/pdf-watermark-expert/id6737170415/reviews) |
| Number of ratings | **4** | 1 |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 127 MB | 68 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NextLabs, Inc.](https://appshunter.io/developer/1148192920) | [Muhammad Awais Younas](https://appshunter.io/developer/1771187232) |

## What reviewers say

### SkyDRM

[App page](https://appshunter.io/ios/app/skydrm/id1148196131)

Securely protect, share, and monitor sensitive files with digital rights management. Control access and usage even when files are shared outside your network. Enables secure collaboration across devices and repositories.

**Highlights:** File protection with digital rights, Control viewing, editing, printing, and sharing, Secure file sharing inside and outside organization, Offline viewing of protected files, Track and monitor file activity logs, Support for various file types including CAD

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

**In-app purchases:** none


### PDF Watermark Expert

[App page](https://appshunter.io/ios/app/pdf-watermark-expert/id6737170415)

Easily add custom text watermarks to your PDF documents for enhanced security and branding. Personalize fonts, colors, transparency, and position to protect your files from misuse and plagiarism. The app offers a user-friendly interface and cross-platform compatibility for seamless document workflow.

**Highlights:** Add custom text watermarks, Full watermark customization, Secure PDF files, User-friendly interface, Cross-platform compatibility, Fast processing

**Features:** macOS Compatibility

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Week | $2.99 | per 7 days |
| Premium Month | $7.99 | per month |
| Premium Year | $44.99 | per year |


## Frequently asked questions

### Is SkyDRM free?

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

### Is PDF Watermark Expert free?

PDF Watermark Expert is free to download, with in-app purchases available.

### Which has better reviews, SkyDRM or PDF Watermark Expert?

SkyDRM and PDF Watermark Expert are both rated 5.0 out of 5 on the App Store, from 4 and 1 ratings respectively.

### Do SkyDRM or PDF Watermark Expert have ads?

PDF Watermark Expert shows ads; SkyDRM does not.

### Which is updated more often, SkyDRM or PDF Watermark Expert?

SkyDRM ships an update every 3 months, and PDF Watermark Expert every 4 months. Most recently, SkyDRM was updated on October 6, 2026 and PDF Watermark Expert on October 16, 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.*