Comparison

Grok vs PDF Masker

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Grok

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
Read full description

Grok is a powerful AI assistant developed by SpaceXSI. Designed to be maximally truthful, useful, and curious, Grok helps you get better answers, create faster, and understand the world in real time. Whether you need intelligent conversation, advanced research, coding help, or high-quality image and video generation, Grok delivers. AI Assistant Ask anything and get fast, well-reasoned replies. Have Grok do deep research on the web, solve complex problems in math, science, and coding, or analyze documents, photos, and links in the chat. This AI assistant turns complicated topics into clear, actionable insights and can handle multi-step tasks with strong reasoning. Grok Imagine – AI Image and Video Generation Experience fast and powerful AI image and video creation. Generate striking images from text, create short videos with sound, or turn your photos into dynamic videos. You can even generate images using just your voice. Edit existing images by removing objects, changing backgrounds, or applying artistic styles — all with precise control and high quality. Grok Voice Mode Have natural voice conversations with Grok. Talk to your AI assistant and receive human-like replies in real time. Personalize how you interact and choose different conversation styles that match your needs. Real-Time Information from X Get the most up-to-date answers. With direct access to X and the web, this AI assistant keeps you informed about the latest news, trends, and conversations happening right now. Ask Grok to perform advanced searches on X and discover what people are really saying. Easily Transfer Context to Grok Already using ChatGPT, Claude, Gemini or other AI tools? Easily transfer your conversations and context to Grok so you can continue working without starting over. Real-World Use Cases Students use Grok to study and get clear explanations. Professionals rely on it for research, writing, analysis, and problem-solving. Content creators generate custom images and videos in seconds. Developers get strong coding help and technical insights. Anyone who wants a fast, truthful, and creative AI assistant can benefit from Grok. Who Is Grok For? Grok is built for curious people who want more than basic answers. It’s perfect for students, professionals, creators, researchers, and anyone looking for a powerful AI chat experience combined with advanced image, video, and agent capabilities. If you value truth-seeking, creativity, and real-time knowledge, Grok is made for you. With Grok as your personal AI assistant, navigating knowledge, sparking creativity, and getting real work done becomes faster and more exciting. Download Grok today and experience what a truly helpful AI can do. Terms of Service: https://x.ai/legal/terms-of-service Privacy Policy: https://x.ai/legal/privacy-policy Grok by SpaceXSI

About

PDF Masker

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
Read full description

Protect your sensitive information before sharing files with others. PDF Masker is a powerful security tool that lets you search and black out specific keywords across your PDF documents automatically. Import any PDF directly from your device using the Share menu. Enter your target keywords, and the app instantly hides matching text so you can send your documents safely. You can choose to export your final file as a searchable text-based PDF or as an image-based PDF. The image-based option is perfect when you want to permanently erase underlying text data so it can never be copied or recovered. Key Features - Smart Bulk Redaction: Enter a keyword and automatically mask every single match across the entire document. - Multiple Keywords Support: Separate multiple terms using spaces or commas to clear different pieces of data at once. - 100 Item History Tracker: Saves up to 100 of your frequently used keywords so you can reapply them with a single tap. - Custom Redaction Colors: Change the color of your redaction blocks from classic blackout to white or any custom tone. - Flexible File Loading: Easily load files from your system file picker, in-app web browser, or straight from other apps via the Share extension. - 100 Percent Offline Security: All processing happens locally on your phone or tablet. Your private and confidential documents are never sent to external servers. - Clean and Fast User Interface: Designed to be clean, fast, and simple for everyone, with no complex setup required. Whether you are hiding account numbers, blurred names, personal addresses, or sensitive corporate contracts, PDF Masker helps you prevent data leaks on the go.

Screenshots

Grok4 screens
PDF Masker4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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

Scorecard8 real differences · 3 level
Grok versus PDF Masker: the parameters behind the verdict, then further details
ParameterGrokPDF Masker
PriceFreeFree
Rating4.9 (1.6M ratings) — better2.0 (1 ratings)
Positive reviews71.6% of reviews — better0.0% of reviews
Number of ratings1.6M — better1
Update frequencyEvery 2 days — betterMonthly
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesAd-supported — better
Best chart rank#4 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS1715.0 — better
Further details — not scored
Size183 MB14 MB
Age rating17+4+
DeveloperX Corp.Kazuhisa Kobayashi

Customer experience

Grok

All ratings1,569,226 ratings
Positive97.5%
Neutral1.3%
Negative1.3%
Written reviews15,366 reviews
Positive71.6%
Neutral4.4%
Negative24.0%

PDF Masker

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

Grok

Reported bugs

2 issues
  • Login issues with X account integration
  • Inaccurate chess move suggestions

Requested features

4 requests
  • 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

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

Grok

Subscriptions5
  • SuperGrok Lite$10.001 Month
  • SuperGrok2 variants$30.001 Month
  • SuperGrok Plus$100.001 Month
Show 2 more
  • SuperGrok Heavy$300.001 Month
  • SuperGrok$300.001 Year
One-time4
  • Extra Usage Credits 5 USD$5.00
  • Extra Usage Credits 20 USD$20.00
  • Extra Usage Credits 50 USD$50.00
Show 1 more
  • Extra Usage Credits 100 USD$100.00
1 purchases

PDF Masker

One-time1
  • Remove Ads$4.99

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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