# I vs Defender System Z

The clearest difference is iOS requirement: Defender System Z at 14.0.0 against I's 16.4. 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.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on October 17, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | I | Defender System Z |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 116 MB | 55 MB |
| Requires iOS | 16.4 | **14.0.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [GUIDEPOINT SYSTEMS EUROPE](https://appshunter.io/developer/1749496312) | [Techloop Developer](https://appshunter.io/developer/1807048134) |

## What reviewers say

### I

[App page](https://appshunter.io/ios/app/i-duv-canada/id6503607752)

**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 I free?

I 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.

### Do I or Defender System Z have ads?

Neither I nor Defender System Z shows ads.

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

I ships an update every 3 weeks, and Defender System Z every 3 weeks. Most recently, I was updated on October 17, 2026 and Defender System Z on October 2, 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.*