Comparison

PDF Master vs Security Master

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

Security Master

Protect your personal information and enhance your online activity. This app offers privacy checks, data leak alerts, secure storage for sensitive files, and a protected browsing experience. Keep your digital life safe and your browsing uninterrupted.

Highlights
  • Privacy Checkup
  • Data Leaks Check
  • Safe Storage for Files
  • Secure Browser
  • Malicious Sites Blocking
  • Tracker and Ad Blocking
Features
Read full description

Security Master is your ultimate companion for safeguarding your private information and enhancing your online experience. This comprehensive app offers robust security features to ensure your data remains confidential and protected: - Privacy Checkup: Conduct regular privacy checkups to ensure your information is secure and identify potential vulnerabilities. - Data Leaks Check: Stay informed about any data breaches affecting your accounts, enabling you to take prompt action to secure your information. - Safe Storage: Utilize the hidden folder to securely store your photos, videos, and documents, keeping them safe from unauthorized access. - Secure Browser: Enjoy a safer browsing experience with the embedded secure browser, which protects you from tracking and data theft. Trust Security Master to keep your digital life secure and your browsing uninterrupted. The application offers the following subscriptions: Premium Weekly and Premium Weekly subscriptions: Provides access to all premium features, such as malicious sites, trackers and ads blocking, user's security review, data breaches monitor. Your subscription will automatically renew unless you turn off auto-renew at least 24 hours before the end of the current period. You can manage your subscriptions and disable auto-renewal through Account Settings after purchase. Any unused portion of a trial period will be forfeited when you purchase a subscription. Payment will be charged to your iTunes Account upon confirmation of purchase. The account will be charged for renewal within 24 hours before the end of the current period, with the cost based on the chosen plan. By using Security Master, you consent to our Terms of Service and Privacy Policy: https://securemasterapp.xyz/privacy_policy.html https://securemasterapp.xyz/terms_and_conditions.html

Screenshots

PDF Master4 screens
Security Master4 screens

Verdict

The call

PDF Master and Security Master both sit at 4.3 stars, but that hides the real split: 55% of Security Master's written reviews are positive against 9% of PDF Master's. Security Master also leads on monetization model (free with in-app purchases vs subscription) and ratings volume (4K vs 200). On price, rating, update cadence and ads 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 Security Master sells 2 in-app purchases, starting at $8.99 per 7 days. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.3 for PDF Master against 4.4 for Security Master. That said, the two scores are not equally well evidenced: Security Master has 4K ratings behind it against 200, so its average is the more settled of the two. Written reviews are what separate them: 9% of PDF Master's written reviews are positive against 55% of Security Master's.

UpkeepUpdate frequency

PDF Master ships an update every 2 weeks, Security Master every 11 days. The most recent releases landed on September 27, 2026 and October 3, 2026 respectively.

Scorecard3 real differences · 7 level
PDF Master versus Security Master: the parameters behind the verdict, then further details
ParameterPDF MasterSecurity Master
PriceFreeFree
Rating4.3 (200 ratings)4.4 (4K ratings) — better
Positive reviews9.1% of reviews55.0% of reviews — better
Number of ratings2004K — better
Update frequencyEvery 2 weeksEvery 11 days — better
AdsYesYes
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS14.0 — better15.0
Further details — not scored
Size119 MB20 MB
Age rating4+17+
DeveloperCheeseJoy AppsMobiwave Limited

Customer experience

PDF Master

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

Security Master

All ratings3,981 ratings
Positive84.2%
Neutral8.5%
Negative7.3%
Written reviews20 reviews
Positive55.0%
Neutral10.0%
Negative35.0%

Bugs and requests

PDF Master

Not enough reviews yet to summarise bugs or requests.

Security Master

Reported bugs

2 issues
  • Login issues
  • Compatibility problems

Requested features

2 requests
  • More help and guidance for users
  • Free trial period

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
2 purchases

Security Master

Subscriptions2
  • Trial Premium Weekly3 Days trial$8.997 Days
  • Premium Yearly$49.991 Year

Questions

Is PDF Master free?
PDF Master is free to download, with in-app purchases available.
Is Security Master free?
Security Master is free to download, with in-app purchases available.
Which has better reviews, PDF Master or Security Master?
Security Master is rated higher. PDF Master averages 4.3 out of 5 from 200 ratings, while Security Master averages 4.4 from 4K ratings.
Do PDF Master or Security Master have ads?
Both PDF Master and Security Master show ads.
Which is updated more often, PDF Master or Security Master?
PDF Master ships an update every 2 weeks, and Security Master every 11 days. Most recently, PDF Master was updated on September 27, 2026 and Security Master on October 3, 2026.

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