# MAXBOOK vs SCPI Zen

The clearest difference is iOS requirement: MAXBOOK at 12.0 against SCPI Zen's 18.2. On price, update cadence, ads and in-app purchases there is nothing between them.

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

MAXBOOK ships an update every 4 days, SCPI Zen every 8 days. The most recent releases landed on September 20, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | MAXBOOK | SCPI Zen |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 8 days |
| Size | 34 MB | 9 MB |
| Requires iOS | **12.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [MAXULA BOURSE](https://appshunter.io/developer/1844330712) | [LittleCodeShop.com](https://appshunter.io/developer/288684013) |

## What reviewers say

### MAXBOOK

[App page](https://appshunter.io/ios/app/maxbook/id1662328484)

**Features:** macOS Compatibility

**In-app purchases:** none


### SCPI Zen

[App page](https://appshunter.io/ios/app/scpi-zen/id6745721063)

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

**In-app purchases:** none


## Frequently asked questions

### Is MAXBOOK free?

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

### Is SCPI Zen free?

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

### Do MAXBOOK or SCPI Zen have ads?

Neither MAXBOOK nor SCPI Zen shows ads.

### Which is updated more often, MAXBOOK or SCPI Zen?

MAXBOOK ships an update every 4 days, and SCPI Zen every 8 days. Most recently, MAXBOOK was updated on September 20, 2026 and SCPI Zen on September 11, 2026.

---

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