# Book vs Buck's ERP

The clearest difference is iOS requirement: Book at 13.0 against Buck's ERP's 15.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Book ships an update every 3 days, Buck's ERP every 4 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Book | Buck's ERP |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 days |
| Size | 38 MB | 29 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Marlenus, LLC](https://appshunter.io/developer/1780343114) | [Buck's Dog Training LLC](https://appshunter.io/developer/1877805773) |

## What reviewers say

### Book

[App page](https://appshunter.io/ios/app/book-me/id6738625204)

**Features:** macOS Compatibility

**In-app purchases:** none


### Buck's ERP

[App page](https://appshunter.io/ios/app/bucks-erp/id6759273113)

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

**In-app purchases:** none


## Frequently asked questions

### Is Book free?

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

### Is Buck's ERP free?

Buck's ERP is free to download, with no in-app purchases.

### Do Book or Buck's ERP have ads?

Neither Book nor Buck's ERP shows ads.

### Which is updated more often, Book or Buck's ERP?

Book ships an update every 3 days, and Buck's ERP every 4 days. Most recently, Book was updated on October 30, 2026 and Buck's ERP on October 31, 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.*