# ZCS service vs I

The clearest difference is update cadence: ZCS service at monthly against I's every 6 months. I's advantage is iOS requirement (12.0 vs 15.6). 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.

ZCS service ships an update monthly, I every 6 months. The most recent releases landed on November 3, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | ZCS service | I |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 6 months |
| Size | 139 MB | 28 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Zucchetti Centro Sistemi S.p.A.](https://appshunter.io/developer/563446312) | [GAMMA SISTEMI SAS DI PEDRAZZOLI ROBERTO E C.](https://appshunter.io/developer/1686810315) |

## What reviewers say

### ZCS service

[App page](https://appshunter.io/ios/app/zcs-service/id1596323350)

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

**In-app purchases:** none


### I

[App page](https://appshunter.io/ios/app/i-bat/id6449299088)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ZCS service free?

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

### Is I free?

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

### Do ZCS service or I have ads?

Neither ZCS service nor I shows ads.

### Which is updated more often, ZCS service or I?

ZCS service ships an update monthly, and I every 6 months. Most recently, ZCS service was updated on November 3, 2026 and I on October 27, 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.*