Comparison

PDF Book Reader vs PDF Vault

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

Head to head
About

PDF Book Reader

Easily read, manage, and annotate PDF books and documents. This app offers a smooth reading experience, powerful annotation tools, and seamless cloud integration. Organize, search, and share your PDFs with ease.

Highlights
  • Natural PDF reading and navigation
  • PDF bookmarking and annotation
  • Text search and OCR extraction
  • PDF merging and page rearrangement
  • Cloud storage integration (Google Drive, Dropbox, iCloud)
  • File import and export via cloud and Files app
  • PDF sharing and printing
Features
Read full description

PDF Book Reader app helps you easily and naturally read PDF books and documents. It works as smooth as reading web pages in web browsers. PDF Book Reader is the best app to read, manage and annotate PDF Books and it works beautifully on iOS 14. The most powerful PDF Book reader, carefully designed and optimized specially for the iPhone & iPad. [ KEY FEATURES ] • Naturally read and navigate PDF books • Bookmark PDF e-Books • Annotate PDF e-Books • Search texts in entire PDF files • Extract texts by using OCR • Merge PDF files • Rearrange PDF pages by drag & drop • Connect with Google Drive, Dropbox, iCloud, Photos • Import files from Files, Photos, Google Drive, Dropbox • Automatically and securely save PDF files in Files app • Share PDF files via email, text (sms), cloud solutions • Print PDF files [ Upgrade to subscription version ] Upgrading to subscription version requires auto-renewal subscription. Payment will be charged to your Apple ID account at the confirmation of purchase. The subscription automatically renews unless it is canceled at least 24 hours before the end of the current period. Your account will be charged for renewal within 24 hours prior to the end of the current period. You can manage and cancel your subscriptions by going to your App Store account settings after purchase. Links to Your Privacy Policy and Terms of Use: http://www.btoj.com.au/privacy.html http://www.btoj.com.au/terms.html Please feel free to contact us for anything.

About

PDF Vault

This ultra-lightweight application offers a comprehensive suite of PDF tools, including text-to-speech functionality, digital signing, document scanning, organization, and instant translation. It's designed for efficiency and ease of use, saving device space while enhancing productivity for work, study, or personal tasks.

Highlights
  • Text-to-speech for PDFs
  • Digital document signing
  • Scan paper documents to PDF
  • Organize and manage PDF files
  • Instant document translation
  • Ultra-lightweight and fast
Features
Read full description

Your private PDF workspace, built for people who take their documents seriously. Ask your PDFs questions, understand complex documents, translate, scan, sign, listen, and manage your files in one lightweight app. PDF Vault combines powerful PDF tools with a privacy-first approach: your documents stay on your device. ASK YOUR PDF ANYTHING Have a long report, contract, research paper, manual, or other document? Just ask. Ask PDF lets you ask questions about the content of your document and get answers based on the information inside it. Find important details, understand complex sections, summarize information, and explore your documents without searching through page after page. Your documents stay private and are processed on your device. PRIVATE BY DESIGN Your documents are personal. PDF Vault is designed with privacy at its core. Your PDF data never leaves your device. No document uploads are required for the core PDF experience. Your files remain under your control while you work with them. ALL THE PDF TOOLS YOU NEED Listen to PDFs Turn your documents into spoken audio with built-in text-to-speech. Listen while working, commuting, studying, or simply when you prefer to hear rather than read. Translate PDFs Translate documents and understand content in other languages without leaving your PDF workspace. Scan documents Turn paper documents into digital PDFs using your device camera. Built-in OCR helps make scanned documents searchable and usable. Sign PDFs Sign documents quickly and conveniently. Add your signature and complete documents without printing them. Read and organize Open, read, manage, and organize your PDF files in a clean, focused workspace designed to stay out of your way. LIGHTWEIGHT AND FOCUSED PDF Vault is built to give you the tools you actually need without turning your device into a document-management maze. Whether you are working with contracts, invoices, academic papers, reports, forms, manuals, or personal documents, PDF Vault keeps everything you need close at hand. FOR WORK, STUDY, AND EVERYDAY DOCUMENTS Use PDF Vault at work to understand reports and contracts. Use it at university to explore research papers and study materials. Use it at home to manage forms, manuals, receipts, and other important documents. ONE PRIVATE WORKSPACE FOR YOUR PDFs Read. Ask. Translate. Scan. Sign. Listen. Organize. PDF Vault brings essential PDF tools together while keeping privacy at the center of the experience. PDF Vault Unlimited gives you unlimited access to all PDF Vault features while directly supporting our mission to provide the best privacy-first PDF tool where your data never leaves your device. Terms of Service: https://macmonsters.com/pdf-reader-terms-of-service.html

Screenshots

PDF Book Reader4 screens
PDF Vault2 screens

Verdict

The call

The clearest difference is ads: PDF Vault at none against PDF Book Reader's shown. PDF Book Reader's advantage is update cadence (every 5 days vs fortnightly) and review sentiment (61% vs 50%). On price, in-app purchases, monetization model 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. PDF Book Reader sells 2 in-app purchases, starting at $3.99 per month and PDF Vault sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

PDF Book Reader ships an update every 5 days, PDF Vault fortnightly. The most recent releases landed on September 13, 2026 and September 26, 2026 respectively.

Scorecard4 real differences · 6 level
PDF Book Reader versus PDF Vault: the parameters behind the verdict, then further details
ParameterPDF Book ReaderPDF Vault
PriceFreeFree
Rating3.9 (31 ratings) — better—
Positive reviews61.1% of reviews — better50.0% of reviews
Number of ratings31 — better—
Update frequencyEvery 5 days — betterFortnightly
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS13.0 — better18.1
Further details — not scored
Size46 MB4 MB
Age rating4+4+
DeveloperB TO J PTY LTDDmytro Skorokhod

Customer experience

PDF Book Reader

All ratings31 ratings
Positive74.2%
Neutral3.2%
Negative22.6%
Written reviews18 reviews
Positive61.1%
Neutral0.0%
Negative38.9%

PDF Vault

Written reviews6 reviews
Positive50.0%
Neutral16.7%
Negative33.3%

In-app purchases

2 purchases

PDF Book Reader

Subscriptions2
  • 1 Month Subscription$3.991 Month
  • 1 Year Subscription$28.991 Year
2 purchases

PDF Vault

Subscriptions2
  • Mox PDF Tool Unlimited Monthly7 Days trial$4.991 Month
  • Mox PDF Tool Unlimited Annually7 Days trial$19.991 Year

Questions

Is PDF Book Reader free?
PDF Book Reader is free to download, with in-app purchases available.
Is PDF Vault free?
PDF Vault is free to download, with in-app purchases available.
Do PDF Book Reader or PDF Vault have ads?
PDF Book Reader shows ads; PDF Vault does not.
Which is updated more often, PDF Book Reader or PDF Vault?
PDF Book Reader ships an update every 5 days, and PDF Vault fortnightly. Most recently, PDF Book Reader was updated on September 13, 2026 and PDF Vault on September 26, 2026.

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