# PDF Watermark Assistant vs Maskduck

The clearest difference is price: Maskduck at Free against PDF Watermark Assistant's $0.99. Maskduck also leads on update cadence (weekly vs every 5 months). PDF Watermark Assistant's advantage is in-app purchases (none vs 1). On ads, device support and iOS requirement there is nothing between them.

Maskduck is free to download; PDF Watermark Assistant costs $0.99 up front. Maskduck sells 1 one-off in-app purchase. PDF Watermark Assistant asks for nothing beyond the download.

PDF Watermark Assistant ships an update every 5 months, Maskduck weekly. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | PDF Watermark Assistant | Maskduck |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Weekly** |
| Size | 5 MB | 1 MB |
| Requires iOS | 16.6 | **16.0** |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [乐祥 胡](https://appshunter.io/developer/1572365721) | [雨燕 杨](https://appshunter.io/developer/1842354750) |

## What reviewers say

### PDF Watermark Assistant

[App page](https://appshunter.io/ios/app/pdf-watermark-assistant/id6747923103)

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

**In-app purchases:** none


### Maskduck

[App page](https://appshunter.io/ios/app/maskduck/id6762729063)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Watermark | $0.99 | one-time |


## Frequently asked questions

### Is PDF Watermark Assistant free?

PDF Watermark Assistant costs $0.99, with no in-app purchases.

### Is Maskduck free?

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

### Do PDF Watermark Assistant or Maskduck have ads?

Neither PDF Watermark Assistant nor Maskduck shows ads.

### Which is updated more often, PDF Watermark Assistant or Maskduck?

PDF Watermark Assistant ships an update every 5 months, and Maskduck weekly. Most recently, PDF Watermark Assistant was updated on October 30, 2026 and Maskduck on October 31, 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.*