# REINER SCT Authenticator vs BookStax

The clearest difference is in-app purchases: REINER SCT Authenticator at none against BookStax's 4. REINER SCT Authenticator also leads on iOS requirement (15.0 vs 18.6). BookStax's advantage is update cadence (every 9 days vs every 5 weeks). On price, ads and device support there is nothing between them.

Both are free to download. BookStax sells 4 one-off in-app purchases. REINER SCT Authenticator asks for nothing beyond the download.

REINER SCT Authenticator ships an update every 5 weeks, BookStax every 9 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | REINER SCT Authenticator | BookStax |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/bookstax/id6761068485/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Every 9 days** |
| Monetization | — | Free |
| Size | 178 MB | 16 MB |
| Requires iOS | **15.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [REINER SCT](https://appshunter.io/developer/635800415) | [Sven Uwe Hanold](https://appshunter.io/developer/1887623795) |

## What reviewers say

### REINER SCT Authenticator

[App page](https://appshunter.io/ios/app/reiner-sct-authenticator/id6757697786)

**In-app purchases:** none


### BookStax

[App page](https://appshunter.io/ios/app/bookstax/id6761068485)

Access and manage your self-hosted BookStack knowledge base natively on iPhone. Edit pages with a Markdown editor, search your content, and access it offline. Prioritizes privacy with secure API token storage.

**Highlights:** BookStack hierarchy navigation, Full-text search with filters, Markdown editor with live preview, Offline read access, Secure API token connection, Light/Dark/System mode, Multi-language support

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Page | $2.99 | one-time |
| Themes & more Servers | $5.99 | one-time |
| Book | $5.99 | one-time |
| Encyclopaedia | $12.99 | one-time |


## Frequently asked questions

### Is REINER SCT Authenticator free?

REINER SCT Authenticator is free to download, with no in-app purchases.

### Is BookStax free?

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

### Do REINER SCT Authenticator or BookStax have ads?

Neither REINER SCT Authenticator nor BookStax shows ads.

### Which is updated more often, REINER SCT Authenticator or BookStax?

REINER SCT Authenticator ships an update every 5 weeks, and BookStax every 9 days. Most recently, REINER SCT Authenticator was updated on October 28, 2026 and BookStax on October 31, 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.*