# Book Guard. vs AuthorAZ

The clearest difference is in-app purchases: Book Guard. at none against AuthorAZ's 1. Book Guard. also leads on update cadence (every 2 days vs every 4 weeks) and iOS requirement (13.0 vs 16.4). On price, ads and device support there is nothing between them.

Both are free to download. AuthorAZ sells 1 one-off in-app purchase. Book Guard. asks for nothing beyond the download.

Book Guard. ships an update every 2 days, AuthorAZ every 4 weeks. The most recent releases landed on September 20, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Book Guard. | AuthorAZ |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Every 4 weeks |
| Size | 76 MB | 62 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Tqnia for Information Technology](https://appshunter.io/developer/1533657655) | [Alex Filip](https://appshunter.io/developer/1013883929) |

## What reviewers say

### Book Guard.

[App page](https://appshunter.io/ios/app/book-guard/id6747822466)

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### AuthorAZ

[App page](https://appshunter.io/ios/app/authoraz/id6781582501)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| English | $29.99 | one-time |


## Frequently asked questions

### Is Book Guard. free?

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

### Is AuthorAZ free?

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

### Do Book Guard. or AuthorAZ have ads?

Neither Book Guard. nor AuthorAZ shows ads.

### Which is updated more often, Book Guard. or AuthorAZ?

Book Guard. ships an update every 2 days, and AuthorAZ every 4 weeks. Most recently, Book Guard. was updated on September 20, 2026 and AuthorAZ on September 17, 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.*