# GoBook ZA vs Jet

The clearest difference is update cadence: Jet at every 9 months against GoBook ZA's every 19 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.

GoBook ZA ships an update every 19 months, Jet every 9 months. The most recent releases landed on November 11, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | GoBook ZA | Jet |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 19 months | **Every 9 months** |
| Size | 166 MB | 304 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mark Nicol](https://appshunter.io/developer/1212792776) | [JA SA IMPORT AND EXPORT CC](https://appshunter.io/developer/1487772393) |

## What reviewers say

### GoBook ZA

[App page](https://appshunter.io/ios/app/gobook-za/id1212792777)

**Features:** macOS Compatibility

**In-app purchases:** none


### Jet

[App page](https://appshunter.io/ios/app/jet-air/id6471776285)

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

**In-app purchases:** none


## Frequently asked questions

### Is GoBook ZA free?

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

### Is Jet free?

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

### Do GoBook ZA or Jet have ads?

Neither GoBook ZA nor Jet shows ads.

### Which is updated more often, GoBook ZA or Jet?

GoBook ZA ships an update every 19 months, and Jet every 9 months. Most recently, GoBook ZA was updated on November 11, 2026 and Jet on November 4, 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.*