# NAIL vs Client Book

The clearest difference is update cadence: NAIL at every 8 days against Client Book's every 3 months. NAIL 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.

NAIL ships an update every 8 days, Client Book every 3 months. The most recent releases landed on September 20, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | NAIL | Client Book |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.5 (2 ratings)](https://appshunter.io/ios/app/nail/id6466114059/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 3 months |
| Monetization | Ad-supported | — |
| Size | 161 MB | 37 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [LLC "NAIL"](https://appshunter.io/developer/1543608127) | [Andrei Kaptsiuh](https://appshunter.io/developer/1798648245) |

## What reviewers say

### NAIL

[App page](https://appshunter.io/ios/app/nail/id6466114059)

This app automates business operations for client appointments. It offers online booking, client management, notifications, and a gallery of work. Secure data backup ensures your information is safe.

**Highlights:** Online booking, Client database, Notifications, Work gallery, Schedule control, Data backup

**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 NAIL free?

NAIL 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 NAIL or Client Book have ads?

Neither NAIL nor Client Book shows ads.

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

NAIL ships an update every 8 days, and Client Book every 3 months. Most recently, NAIL was updated on September 20, 2026 and Client Book on September 9, 2026.

---

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