# PDF Book Reader vs PDF Vault

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.

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.

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.

## The numbers

| Metric | PDF Book Reader | PDF Vault |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.9 (31 ratings)](https://appshunter.io/ios/app/pdf-book-reader/id1576631236/reviews)** | — |
| Number of ratings | **31** | — |
| Positive reviews | **61.1% of reviews** | 50.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 5 days** | Fortnightly |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 46 MB | 4 MB |
| Requires iOS | **13.0** | 18.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [B TO J PTY LTD](https://appshunter.io/developer/569308231) | [Dmytro Skorokhod](https://appshunter.io/developer/994177751) |

## What reviewers say

### PDF Book Reader

[App page](https://appshunter.io/ios/app/pdf-book-reader/id1576631236)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Subscription | $3.99 | per month |
| 1 Year Subscription | $28.99 | per year |


### PDF Vault

[App page](https://appshunter.io/ios/app/pdf-vault-document-app/id1599303874)

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:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Mox PDF Tool Unlimited Monthly | $4.99 | per month |
| Mox PDF Tool Unlimited Annually | $19.99 | per year |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*