# Grok vs PDF Masker

The clearest difference is review sentiment: Grok at 72% against PDF Masker's 0%. Grok also leads on rating (4.9 vs 2.0) and ads (none vs shown). PDF Masker's advantage is monetization model (ad-supported vs free with in-app purchases) and iOS requirement (15.0 vs 17). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Grok sells 9 in-app purchases, starting at $10.00 per month and PDF Masker sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Grok holds the better App Store score, 4.9 against 2.0. That said, the two scores are not equally well evidenced: Grok has 1.6M ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 72% of Grok's written reviews are positive against 0% of PDF Masker's.

Grok ships an update every 2 days, PDF Masker monthly. The most recent releases landed on November 5, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Grok | PDF Masker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (1.6M ratings)](https://appshunter.io/ios/app/grok/id6670324846/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/pdf-masker-secure-redaction/id6748043661/reviews) |
| Number of ratings | **1.6M** | 1 |
| Positive reviews | **71.6% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 2 days** | Monthly |
| Monetization | Free with in-app purchases | **Ad-supported** |
| Best chart rank | **#4** | — |
| Size | 183 MB | 14 MB |
| Requires iOS | 17 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [X Corp.](https://appshunter.io/developer/296415947) | [Kazuhisa Kobayashi](https://appshunter.io/developer/1580882000) |

## What reviewers say

### Grok

[App page](https://appshunter.io/ios/app/grok/id6670324846)

**Currently charting:** #4 Top Grossing · Productivity, #7 Top Free · Productivity, #24 Top Grossing, #35 Top Free (US App Store)

This AI assistant provides truthful, useful, and curious responses for research, content creation, and problem-solving. It offers advanced image and video generation, real-time information from X, and natural voice conversations. Easily transfer context from other AI tools to enhance your workflow.

**Highlights:** AI-powered chat and research, Image and video generation, Real-time X data integration, Voice conversation mode, Context transfer from other AI, Coding and problem-solving assistance

**Features:** Vision Pro support, iPhone Duo support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SuperGrok Lite | $10.00 | per month |
| SuperGrok | $30.00 | per month |
| SuperGrok Plus | $100.00 | per month |
| SuperGrok Heavy | $300.00 | per month |
| SuperGrok | $300.00 | per year |
| Extra Usage Credits 5 USD | $5.00 | one-time |
| Extra Usage Credits 20 USD | $20.00 | one-time |
| Extra Usage Credits 50 USD | $50.00 | one-time |
| Extra Usage Credits 100 USD | $100.00 | one-time |

**What reviewers like**

- 🚀 Fast and efficient
- 🔒 Unbiased and ethical
- 👍 Clean and intuitive UI
- 🤖 Powerful AI capabilities
- 🌐 Real-time data integration

**What reviewers complain about**

- 🐛 Occasional errors in responses
- 🔍 Needs more robust search/history features
- 🔌 Requires X account for full functionality

**Reported bugs**

- Login issues with X account integration
- Inaccurate chess move suggestions

**Requested features**

- Integrate chat history across X and Grok apps
- Add user profile customization for personalized image generation
- Expand iOS integration (widgets, Apple Watch support)
- Introduce custom model/prompt creation like ChatGPT


### 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 |


## Frequently asked questions

### Is Grok free?

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

### Is PDF Masker free?

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

### Which has better reviews, Grok or PDF Masker?

Grok is rated higher. Grok averages 4.9 out of 5 from 1.6M ratings, while PDF Masker averages 2.0 from 1 ratings.

### Do Grok or PDF Masker have ads?

PDF Masker shows ads; Grok does not.

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

Grok ships an update every 2 days, and PDF Masker monthly. Most recently, Grok was updated on November 5, 2026 and PDF Masker on October 30, 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.*