Comparison

PDF Secure vs PDF

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

Head to head
About

PDF Secure

Secure your PDF documents by adding password protection, ensuring they cannot be opened without authorization. You can also easily remove existing password protection from your files. This app offers a straightforward process for safeguarding your sensitive information.

Highlights
  • Password protect PDF documents
  • Remove PDF password protection
  • Cross-platform compatibility
  • Export to various locations
  • Dark mode support
Read full description

Protect your PDF documents with a password. The PDF won't open without the password. It works on any platform. PDF Secure also allows you to completely remove the password protection of a document. Using PDF Secure is very simple: • Select a PDF document from your files • Choose a password (ideally strong) and do not forget it • Export anywhere (Files app, any cloud drive, E-mail, AirDrop, Messages, ...) → The password will now be requested at any attempt to open the PDF (on all platforms) PDF Secure is compatible with the dark mode. And it's 100% free (no in-app purchases, no ads). NO DATA COLLECTION. Everything happens on device. Your privacy matters. Enjoy!

About

PDF

Secure your documents by adding password protection or remove existing passwords from PDF files. This app also offers tools to merge, extract, and convert PDFs, along with OCR capabilities to recognize text.

Highlights
  • Lock PDF with password
  • Unlock password-protected PDFs
  • Merge multiple PDF files
  • Extract or remove PDF pages
  • Add watermarks to PDFs
  • Scan and recognize text (OCR)
  • Digitally sign PDFs
  • Convert web pages to PDF
Features
Read full description

Instantly lock and unlock PDF password using PDF: Lock & Unlock. Your PDF will be locked or unlocked and ready for download within seconds. Most PDFs can be unlocked! Files with an owner password can be unlocked instantly. However, if the file is thoroughly encrypted, you can only unlock the file by providing the correct password. PDF: Lock & Unlock is the ultimate solution for managing your PDF files with ease and efficiency. Whether you need to secure, edit, or convert PDFs, this powerful iOS application provides all the essential tools in one place. Key Features: Secure & Protect Your PDFs * Lock PDF – Set a strong password to restrict unauthorized access. * Unlock PDF – Remove password protection from encrypted PDFs easily. Edit & Modify PDFs * Merge PDF – Combine multiple PDF files into a single document in seconds. * Page Remover – Delete unwanted pages from a PDF for a cleaner document. * Extract Pages – Select and save specific pages from a PDF as a new file. * Add Watermark – Protect your PDFs with custom text or image watermarks. Text Extraction & Recognition * Text Scanner (OCR) – Scan printed or handwritten text and convert it into digital text. * Text Recognize – Detect and extract text from images or PDF documents with high accuracy. * PDF to Text – Convert PDFs into plain text files for easy editing. Sign & Authenticate Documents * Digital Signature – Add legally binding electronic signatures directly to your PDFs. Convert & Share PDFs * Web to PDF – Save web pages as PDFs for offline reading and sharing. * Fast & Secure Sharing – Share PDFs via email, cloud storage, or messaging apps. How to remove passwords from PDF files: 1. Select your PDF document. 2. Enter your password. 3. Select the option to remove the password. 4. File will save in saved files. 5. Users can share saved pdf files Features: - Users can lock and unlock pdf files. - It is easy to use. - Users can get all saved pdf files. - Users can share pdf files. - Users can delete pdf files. - Users can view pdf files. Main Features : - Lock PDF – Protect your PDFs with a secure password to prevent unauthorized access. - Unlock PDF – Remove password protection from PDFs for hassle-free access. - Merge PDF – Combine multiple PDFs into a single document with just a few taps. - Add Watermark – Insert custom watermarks to protect your documents from unauthorized use. - Text Scanner (OCR) – Extract text from images or scanned documents with high accuracy. - Text Recognize – Convert handwritten or printed text into editable digital text. - Digital Signature – Sign your PDFs electronically for quick and secure document authentication. - Extract Pages – Select and extract specific pages from a PDF file to create a new document. - Web to PDF – Convert web pages into PDFs for offline reading and sharing. - Page Remover – Delete unnecessary pages from your PDF to streamline the document. - PDF to Text – Convert PDFs into editable text files for easy modification. Why Choose PDF: Lock & Unlock? - All-in-One PDF Manager – No need for multiple apps; get everything in one place. - User-Friendly Interface – Simple and intuitive design for easy navigation. - Fast & Efficient Processing – Perform PDF actions in seconds. - Offline Mode – Most features work without an internet connection. - Secure & Private – Your files remain private, with no data leaks. Download and enjoy the PDF: Lock & Unlock app. Privacy Policy: https://softapps.in/App_Privacy.html Terms of use: https://softapps.in/App_TOS.html

Screenshots

PDF Secure4 screens
PDF4 screens

Verdict

The call

The clearest difference is review sentiment: PDF Secure at 99% against PDF's 33%. PDF Secure also leads on rating (4.9 vs 3.5) and in-app purchases (none vs 3). On price, update cadence, device support and iOS requirement 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 sells 3 in-app purchases, starting at $4.99 per 7 days. PDF Secure asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

PDF Secure holds the better App Store score, 4.9 against 3.5. That said, the two scores are not equally well evidenced: PDF Secure has 376 ratings behind it against 6, so its average is the more settled of the two. Written reviews point the same way: 99% of PDF Secure's written reviews are positive against 33% of PDF's.

UpkeepUpdate frequency

PDF Secure ships an update every 9 months, PDF every 5 months. The most recent releases landed on September 24, 2026 and September 7, 2026 respectively.

Scorecard6 real differences · 4 level
PDF Secure versus PDF: the parameters behind the verdict, then further details
ParameterPDF SecurePDF
PriceFreeFree
Rating4.9 (376 ratings) — better3.5 (6 ratings)
Positive reviews98.8% of reviews — better33.3% of reviews
Number of ratings376 — better6
Update frequencyEvery 9 monthsEvery 5 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.013.0
Further details — not scored
Size1 MB26 MB
Age rating4+4+
DeveloperiSolid appsHardik Dhameliya

Customer experience

PDF Secure

All ratings376 ratings
Positive96.0%
Neutral1.9%
Negative2.1%
Written reviews257 reviews
Positive98.8%
Neutral0.8%
Negative0.4%

PDF

All ratings6 ratings
Positive66.7%
Neutral0.0%
Negative33.3%
Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

In-app purchases

None

PDF Secure

No in-app purchases

3 purchases

PDF

Subscriptions3
  • Subscription Weekly$4.997 Days
  • Subscription Monthly$9.991 Month
  • Subscription Yearly3 Days trial$19.991 Year

Questions

Is PDF Secure free?
PDF Secure is free to download, with no in-app purchases.
Is PDF free?
PDF is free to download, with in-app purchases available.
Which has better reviews, PDF Secure or PDF?
PDF Secure is rated higher. PDF Secure averages 4.9 out of 5 from 376 ratings, while PDF averages 3.5 from 6 ratings.
Do PDF Secure or PDF have ads?
PDF shows ads; PDF Secure does not.
Which is updated more often, PDF Secure or PDF?
PDF Secure ships an update every 9 months, and PDF every 5 months. Most recently, PDF Secure was updated on September 24, 2026 and PDF on September 7, 2026.

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