Comparison

PDF Master vs AI Security

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

Head to head
About

PDF Master

This app offers a comprehensive suite of tools for managing PDF documents on iOS. It allows users to scan physical documents and gallery images into PDFs, create new PDFs from scratch, view existing files, merge multiple PDFs, and extract text using OCR technology.

Highlights
  • Scan photos to PDF
  • Convert gallery images to PDF
  • Create new PDF files
  • View and read PDF documents
  • Merge multiple PDF files
  • OCR text recognition
Features
Read full description

PDF Master - Your Ultimate PDF Companion Welcome to PDF Master, the powerful and user-friendly iOS PDF app that provides a comprehensive solution for all your PDF needs. Whether you need to scan photos to PDF, organize gallery images, create new PDF, view, or merge existing PDF files, PDF Master has you covered. - Scan Photos to PDF: Effortlessly convert your physical documents, photos, or handwritten notes into high-quality PDF documents. - Convert Gallery Images to PDF: Select images from your gallery, quickly create beautiful PDF files for easy sharing and storage. - Create PDF Files: Build new PDF from scratch, add text, images, and annotations, tailor your documents to your liking. - View PDF: Browse and read PDF files, with support for page zoom, rotation, and soon-to-come bookmark features, ensuring a comfortable reading experience. - Merge PDF Files: Combine multiple PDF files into one, effortlessly manage and organize your documents. - OCR (Text Recognition): Utilize OCR technology to extract text from scanned documents, making content more searchable and editable. PDF Master is your ideal choice for working with PDF files in various scenarios, whether in the office, school or daily life. Download PDF Master now and start a convenient new way to manage PDF documents! Payment & Subscription Terms: Choose between the following subscription options for unlimited access to all features: You may cancel your subscription at any time You can cancel auto-renewal at any time, given that the cancellation is at least 24 hours before the end of the current period. Any unused portion of a free trial period will be forfeited when making a purchase of an auto-renewing subscription. Manage your subscription directly from your iPhone Subscriptions can be managed by the user and auto-renewal can be turned off by going to the Account Settings: Account Settings: - Open the Settings app. - Tap your name. - Tap Subscriptions. - Tap the subscription that you want to manage. For app support and more information, reach out to us at: kma45143@outlook.com Privacy policy: https://sites.google.com/view/pdf-master-privacy-policy/ Terms of use: https://sites.google.com/view/pdfmastertermsofuse/

About

AI Security

This app offers a suite of tools to protect your phone and privacy. It includes a secure browser, device security checks, Wi-Fi safety evaluation, ad blocker, private vault, and phone cleaner to free up storage space.

Highlights
  • Secure Browser
  • Device Security Check
  • Wi-Fi Safety Evaluation
  • Duplicate Photo & Video Cleaner
  • Private Vault
  • Ad Blocker
Features
Read full description

"AI Security: Storage Privacy" is an AI Security apps. It protects your phone and privacy. "AI Security: Storage Privacy" can safeguard your device and privacy, your trusted companion for mobile protection. Featuring essential tools to fortify your digital defenses, including a Secure Browser, Device Security Check, Wi-Fi Safety Evaluation, Ad Blocker, Private Vault and Phone Cleaner, AI Security ensures your mobile experience is safe and private. "AI Security: Storage Privacy" provides you with a lot of security features: 1. Secure Browser: Browse securely with protection against malicious websites and phishing attempts. 2. Device Security Check: Detect and address vulnerabilities to keep your device secure against cyber threats. 3. Wi-Fi Detection: Ensure your Wi-Fi network is safe from potential risks and unauthorized access. 4. Photos & Videos Cleaner: Delete Duplicate Photo, Clean Up Duplicate Video, Cleanup Phone Storage, Free Up Storage Space. 5. Secret Space: Keep sensitive data and files protected in a secure private vault. 6. Discover More: Explore additional features such as widgets and a flashlight for added convenience. Choose one of the subscription options below to get unlimited access to all security features: • Weekly Subscription • Yearly Subscription FREE TRIAL FOR 3 DAYS - OFFERING UNLIMITED SECURITY PROTECT FOR A LIMITED TIME You may cancel your subscription at any time Free trial allows you unlimited access to all security features for the duration of 3 days. Your account will be automatically charged for renewal, based on the annual subscription plan, within 24 hours before the end of the 3 days free trial period. You can cancel auto-renewal at any time, given that the cancellation is at least 24 hours before the end of the current period. Any unused portion of a free trial period will be forfeited when making a purchase of an auto-renewing subscription. Manage your subscription directly from your iPhone, Subscriptions can be managed by the user and auto-renewal can be turned off by going to the Account Settings: - Open the Settings app. - Tap your name. - Tap Subscriptions. - Tap the subscription that you want to manage. For app support and more information, reach out to us at: Gladysss941@outlook.com Privacy Policy: https://sites.google.com/view/ai-privacy-protection Terms of Use: https://sites.google.com/view/ai-terms-service

Screenshots

PDF Master4 screens
AI Security4 screens

Verdict

The call

The clearest difference is review sentiment: AI Security at 49% against PDF Master's 9%. AI Security also leads on ads (none vs shown) and ratings volume (9.5K vs 200). On price, update cadence, in-app purchases and monetization model 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. PDF Master sells 12 in-app purchases, starting at $0.99 per 7 days and AI Security sells 12 in-app purchases, starting at $5.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

AI Security holds the better App Store score, 4.5 against 4.3. That said, the two scores are not equally well evidenced: AI Security has 9.5K ratings behind it against 200, so its average is the more settled of the two. Written reviews point the same way: 9% of PDF Master's written reviews are positive against 49% of AI Security's.

UpkeepUpdate frequency

PDF Master ships an update every 2 weeks, AI Security every 3 weeks. The most recent releases landed on September 27, 2026 and October 1, 2026 respectively.

Scorecard4 real differences · 6 level
PDF Master versus AI Security: the parameters behind the verdict, then further details
ParameterPDF MasterAI Security
PriceFreeFree
Rating4.3 (200 ratings)4.5 (9.5K ratings) — better
Positive reviews9.1% of reviews49.0% of reviews — better
Number of ratings2009.5K — better
Update frequencyEvery 2 weeks — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationSubscriptionSubscription
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.0 — better15.0
Further details — not scored
Size119 MB151 MB
Age rating4+4+
DeveloperCheeseJoy AppsMagic Snail

Customer experience

PDF Master

All ratings200 ratings
Positive79.0%
Neutral7.0%
Negative14.0%
Written reviews11 reviews
Positive9.1%
Neutral0.0%
Negative90.9%

AI Security

All ratings9,520 ratings
Positive87.0%
Neutral7.7%
Negative5.3%
Written reviews102 reviews
Positive49.0%
Neutral7.8%
Negative43.1%

Bugs and requests

PDF Master

Not enough reviews yet to summarise bugs or requests.

AI Security

Reported bugs

3 issues
  • Accidentally deleting important photos and files
  • App reverting user settings and choices
  • Compatibility issues with older devices

Requested features

3 requests
  • More transparency about pricing and features
  • Better explanation of how the app works
  • Option to selectively clean files instead of bulk deletion

In-app purchases

12 purchases

PDF Master

Subscriptions11
  • PDF Master$0.997 Days
  • weekly3 Days trial$4.997 Days
  • PDF Master PRO 1 Week$5.997 Days
Show 8 more
  • PDF Master PRO 1 Week3 Days trial$5.997 Days
  • PDF Master PRO 1 Week7 Days trial$5.997 Days
  • PDF Master PRO 1 Week3 Days trial$9.997 Days
  • PDF Master PRO 1 Week7 Days trial$9.997 Days
  • Monthly Pro$9.991 Month
  • PDF Master PRO 1 Year$29.991 Year
  • PDF Master PRO 1 Year$34.991 Year
  • PDF Master PRO 1 Year$39.991 Year
One-time1
  • PDF Master Pro$19.99
12 purchases

AI Security

Subscriptions11
  • AI Security Pro 1 Week7 Days trial$5.997 Days
  • AI Security Pro 1 Week3 Days trial$5.997 Days
  • AI Security Pro 1 Week3 Days trial$6.997 Days
Show 8 more
  • AI Security Pro 1 Week3 Days trial$9.997 Days
  • AI Security Pro 1 Month1 Month trial$9.991 Month
  • AI Security Pro 1 Week7 Days trial$9.997 Days
  • AI Security Pro 1 Week3 Days trial$12.997 Days
  • AI Security Pro 1 Week7 Days trial$12.997 Days
  • AI Security Pro 1 Year$29.991 Year
  • AI Security Pro 1 Year$34.991 Year
  • AI Security Pro 1 Year$39.991 Year
One-time1
  • AI Security Pro Permanent$19.99

Questions

Is PDF Master free?
PDF Master is free to download, with in-app purchases available.
Is AI Security free?
AI Security is free to download, with in-app purchases available.
Which has better reviews, PDF Master or AI Security?
AI Security is rated higher. PDF Master averages 4.3 out of 5 from 200 ratings, while AI Security averages 4.5 from 9.5K ratings.
Do PDF Master or AI Security have ads?
PDF Master shows ads; AI Security does not.
Which is updated more often, PDF Master or AI Security?
PDF Master ships an update every 2 weeks, and AI Security every 3 weeks. Most recently, PDF Master was updated on September 27, 2026 and AI Security on October 1, 2026.

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