# Client Book vs ClientFlow

The clearest difference is in-app purchases: Client Book at none against ClientFlow's 6. ClientFlow's advantage is update cadence (weekly vs every 3 months) and device support (4 vs 2). On price, ads and iOS requirement there is nothing between them.

Both are free to download. ClientFlow sells 6 in-app purchases, starting at $0.99 per 7 days. Client Book asks for nothing beyond the download.

Client Book ships an update every 3 months, ClientFlow weekly. The most recent releases landed on October 11, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Client Book | ClientFlow |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Weekly** |
| Size | 37 MB | 22 MB |
| Requires iOS | **15.1** | 16 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Andrei Kaptsiuh](https://appshunter.io/developer/1798648245) | [pcltd](https://appshunter.io/developer/1457816117) |

## What reviewers say

### Client Book

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

**In-app purchases:** none


### ClientFlow

[App page](https://appshunter.io/ios/app/clientflow-booking-and-clients/id6760292220)

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Weekly | $0.99 | per 7 days |
| Premium Monthly No Trial | $2.99 | per month |
| Premium | $4.99 | per month |
| Premium Yearly | $29.99 | per year |
| Premium Yearly | $44.99 | per year |
| Premium Lifetime | $69.99 | one-time |


## Frequently asked questions

### Is Client Book free?

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

### Is ClientFlow free?

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

### Do Client Book or ClientFlow have ads?

Neither Client Book nor ClientFlow shows ads.

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

Client Book ships an update every 3 months, and ClientFlow weekly. Most recently, Client Book was updated on October 11, 2026 and ClientFlow on October 24, 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.*