# PDF Masker vs Nullify

The clearest difference is ads: Nullify at none against PDF Masker's shown. PDF Masker's advantage is update cadence (monthly vs every 3 months) and device support (3 vs 1). On price and in-app purchases there is nothing between them.

Both are free to download. PDF Masker sells 1 one-off in-app purchase and Nullify sells 3 in-app purchases, starting at $3.99 per 7 days. Whichever you choose, the download price is not the number that matters.

PDF Masker ships an update monthly, Nullify every 3 months. The most recent releases landed on August 18, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | PDF Masker | Nullify |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[2.0 (1 ratings)](https://appshunter.io/ios/app/pdf-masker-secure-redaction/id6748043661/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Monthly** | Every 3 months |
| Monetization | Ad-supported | — |
| Size | 14 MB | 11 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Kazuhisa Kobayashi](https://appshunter.io/developer/1580882000) | [SAVAS KOC](https://appshunter.io/developer/1792030670) |

## What reviewers say

### PDF Masker

[App page](https://appshunter.io/ios/app/pdf-masker-secure-redaction/id6748043661)

Easily mask sensitive keywords in PDF files before sharing. Import PDFs, specify multiple keywords, and customize redaction colors. Export as text or image-based PDFs for secure data sharing.

**Highlights:** Import PDFs via Share menu, Bulk keyword redaction, Export as text or image PDF, Multiple keyword support, Customizable redaction color, Save keyword histories

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $4.99 | one-time |


### Nullify

[App page](https://appshunter.io/ios/app/nullify-redact-and-blur-docs/id6761437328)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $3.99 | per 7 days |
| Monthly | $9.99 | per month |
| Annual | $39.99 | per year |


## Frequently asked questions

### Is PDF Masker free?

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

### Is Nullify free?

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

### Do PDF Masker or Nullify have ads?

PDF Masker shows ads; Nullify does not.

### Which is updated more often, PDF Masker or Nullify?

PDF Masker ships an update monthly, and Nullify every 3 months. Most recently, PDF Masker was updated on August 18, 2026 and Nullify on September 9, 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.*