# ZmanUp vs Client Book

ZmanUp and Client Book are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

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

ZmanUp ships an update every 2 months, Client Book every 3 months. Both last shipped on November 8, 2026.

## The numbers

| Metric | ZmanUp | Client Book |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 3 months |
| Size | 54 MB | 37 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Michael Melezhyk](https://appshunter.io/developer/1794300972) | [Andrei Kaptsiuh](https://appshunter.io/developer/1798648245) |

## What reviewers say

### ZmanUp

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

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

**In-app purchases:** none


### Client Book

[App page](https://appshunter.io/ios/app/client-book/id6742812425)

**In-app purchases:** none


## Frequently asked questions

### Is ZmanUp free?

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

### Is Client Book free?

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

### Do ZmanUp or Client Book have ads?

Neither ZmanUp nor Client Book shows ads.

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

ZmanUp ships an update every 2 months, and Client Book every 3 months. Most recently, ZmanUp was updated on November 8, 2026 and Client Book on November 8, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*