# ShiftBOOKD vs Book Six21

The clearest difference is update cadence: ShiftBOOKD at every 2 weeks against Book Six21's every 30 months. 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.

ShiftBOOKD ships an update every 2 weeks, Book Six21 every 30 months. Both last shipped on October 9, 2026.

## The numbers

| Metric | ShiftBOOKD | Book Six21 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (37 ratings)](https://appshunter.io/ios/app/shiftbookd/id1507908655/reviews)** | — |
| Number of ratings | **37** | — |
| Positive reviews | 95.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 30 months |
| Monetization | Freemium | — |
| Size | 75 MB | 13 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [ShiftBOOKD INC](https://appshunter.io/developer/1781627561) | [Tecwi Engineering GmbH](https://appshunter.io/developer/1462340550) |

## What reviewers say

### ShiftBOOKD

[App page](https://appshunter.io/ios/app/shiftbookd/id1507908655)

This platform empowers beauty and hair professionals to manage bookings, payments, and client relationships. It helps entrepreneurs scale their businesses, collaborate with others, and build wealth through their professional network.

**Highlights:** Direct booking from Instagram, Seamless payments with instant deposits, Smart calendar and time control, Non-refundable deposits, Client screening and blocking, Referral commissions, Automated reminders

**Features:** macOS Compatibility, Apple Wallet

**In-app purchases:** none


### Book Six21

[App page](https://appshunter.io/ios/app/book-six21/id1593865259)

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

**In-app purchases:** none


## Frequently asked questions

### Is ShiftBOOKD free?

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

### Is Book Six21 free?

Book Six21 is free to download, with no in-app purchases.

### Do ShiftBOOKD or Book Six21 have ads?

Neither ShiftBOOKD nor Book Six21 shows ads.

### Which is updated more often, ShiftBOOKD or Book Six21?

ShiftBOOKD ships an update every 2 weeks, and Book Six21 every 30 months. Most recently, ShiftBOOKD was updated on October 9, 2026 and Book Six21 on October 9, 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.*