# Zanzero vs Defender System Z

The clearest difference is update cadence: Defender System Z at every 3 weeks against Zanzero's every 6 months. Defender System Z also leads on device support. On price, in-app purchases and iOS requirement there is nothing between them.

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

Zanzero ships an update every 6 months, Defender System Z every 3 weeks. The most recent releases landed on September 18, 2026 and September 15, 2026 respectively.

## The numbers

| Metric | Zanzero | Defender System Z |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | — | No |
| Update frequency | Every 6 months | **Every 3 weeks** |
| Size | 46 MB | 55 MB |
| Requires iOS | 15.6 | **14.0.0** |
| Devices | — | **iPhone, iPad, iPod** |
| Age rating | 9+ | 4+ |
| Developer | [GAMMA SISTEMI SAS DI PEDRAZZOLI ROBERTO E C.](https://appshunter.io/developer/1686810315) | [Techloop Developer](https://appshunter.io/developer/1807048134) |

## What reviewers say

### Zanzero

[App page](https://appshunter.io/ios/app/zanzero/id6448891450)

**In-app purchases:** none


### Defender System Z

[App page](https://appshunter.io/ios/app/defender-system-z-control/id6744317231)

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

**In-app purchases:** none


## Frequently asked questions

### Is Zanzero free?

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

### Is Defender System Z free?

Defender System Z is free to download, with no in-app purchases.

### Which is updated more often, Zanzero or Defender System Z?

Zanzero ships an update every 6 months, and Defender System Z every 3 weeks. Most recently, Zanzero was updated on September 18, 2026 and Defender System Z on September 15, 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.*