# Book vs ZmanUp

The clearest difference is update cadence: Book at every 3 days against ZmanUp's every 2 months. Book also leads on iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases and device support 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, ZmanUp every 2 months. The most recent releases landed on March 3, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | Book | ZmanUp |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 2 months |
| Size | 38 MB | 54 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Marlenus, LLC](https://appshunter.io/developer/1780343114) | [Michael Melezhyk](https://appshunter.io/developer/1794300972) |

## What reviewers say

### Book

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

**Features:** macOS Compatibility

**In-app purchases:** none


### ZmanUp

[App page](https://appshunter.io/ios/app/zmanup/id6741470062)

**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 ZmanUp free?

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

### Do Book or ZmanUp have ads?

Neither Book nor ZmanUp shows ads.

### Which is updated more often, Book or ZmanUp?

Book ships an update every 3 days, and ZmanUp every 2 months. Most recently, Book was updated on March 3, 2026 and ZmanUp 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.*