# Audiobook Keeper vs Offline PDF Viewer

The clearest difference is iOS requirement: Offline PDF Viewer at 17.6 against Audiobook Keeper's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Audiobook Keeper sells 1 in-app purchase, starting at $4.99 per month and Offline PDF Viewer sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

## The numbers

| Metric | Audiobook Keeper | Offline PDF Viewer |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | — | Daily |
| Size | 11 MB | 10 MB |
| Requires iOS | 26.0 | **17.6** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Zachary Frew](https://appshunter.io/developer/1434766068) | [takaaki024](https://appshunter.io/developer/393783638) |

## What reviewers say

### Audiobook Keeper

[App page](https://appshunter.io/ios/app/audiobook-keeper/id6788215929)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Audiobook Pro | $4.99 | per month |


### 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 Audiobook Keeper free?

Audiobook Keeper is free to download, with in-app purchases available.

### Is Offline PDF Viewer free?

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

### Do Audiobook Keeper or Offline PDF Viewer have ads?

Neither Audiobook Keeper nor Offline PDF Viewer shows ads.

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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.*