# KZA vs SpectraX ESG

The clearest difference is update cadence: SpectraX ESG at fortnightly against KZA's every 5 weeks. 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.

KZA ships an update every 5 weeks, SpectraX ESG fortnightly. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | KZA | SpectraX ESG |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 weeks | **Fortnightly** |
| Size | 32 MB | 131 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [KZA Aviacao SA](https://appshunter.io/developer/1743454816) | [FARMGUIDE LTDA](https://appshunter.io/developer/1842847775) |

## What reviewers say

### KZA

[App page](https://appshunter.io/ios/app/kza/id6499444789)

**Features:** macOS Compatibility

**In-app purchases:** none


### SpectraX ESG

[App page](https://appshunter.io/ios/app/spectrax-esg/id6755402367)

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

**In-app purchases:** none


## Frequently asked questions

### Is KZA free?

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

### Is SpectraX ESG free?

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

### Do KZA or SpectraX ESG have ads?

Neither KZA nor SpectraX ESG shows ads.

### Which is updated more often, KZA or SpectraX ESG?

KZA ships an update every 5 weeks, and SpectraX ESG fortnightly. Most recently, KZA was updated on October 25, 2026 and SpectraX ESG on October 24, 2026.

---

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