# BookPDF vs Offline PDF Viewer

The clearest difference is in-app purchases: BookPDF at none against Offline PDF Viewer's 1. Offline PDF Viewer's advantage is update cadence (daily vs every 2 days). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Offline PDF Viewer sells 1 one-off in-app purchase. BookPDF asks for nothing beyond the download.

BookPDF ships an update every 2 days, Offline PDF Viewer daily. The most recent releases landed on October 11, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | BookPDF | Offline PDF Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 days | **Daily** |
| Size | 2 MB | 10 MB |
| Requires iOS | 18 | **17.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Yuta Sugawara](https://appshunter.io/developer/1867695269) | [takaaki024](https://appshunter.io/developer/393783638) |

## What reviewers say

### BookPDF

[App page](https://appshunter.io/ios/app/bookpdf/id6758102700)

**Features:** macOS Compatibility

**In-app purchases:** none


### Offline PDF Viewer

[App page](https://appshunter.io/ios/app/offline-pdf-viewer/id6789788357)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Support Developer | $2.99 | one-time |


## Frequently asked questions

### Is BookPDF free?

BookPDF is free to download, with no in-app purchases.

### Is Offline PDF Viewer free?

Offline PDF Viewer is free to download, with in-app purchases available.

### Do BookPDF or Offline PDF Viewer have ads?

Neither BookPDF nor Offline PDF Viewer shows ads.

### Which is updated more often, BookPDF or Offline PDF Viewer?

BookPDF ships an update every 2 days, and Offline PDF Viewer daily. Most recently, BookPDF was updated on October 11, 2026 and Offline PDF Viewer on October 18, 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.*