# Z4 Multi vs FSJ

The clearest difference is update cadence: FSJ at every 22 months against Z4 Multi's every 105 months. On price, review sentiment, 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.

Z4 Multi ships an update every 105 months, FSJ every 22 months. The most recent releases landed on October 2, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Z4 Multi | FSJ |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.1 (16 ratings)](https://appshunter.io/ios/app/fsj-group/id1606879472/reviews)** |
| Number of ratings | — | **16** |
| Positive reviews | 0.0% of reviews | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 105 months | **Every 22 months** |
| Monetization | Free | Free |
| Size | 5 MB | 70 MB |
| Requires iOS | **12.0** | 12.4 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [M S Dehkordi](https://appshunter.io/developer/791605265) | [Mahdiyeh Khodaparastan](https://appshunter.io/developer/1606879474) |

## What reviewers say

### Z4 Multi

[App page](https://appshunter.io/ios/app/z4-multi/id1023816036)

This advanced application allows users to remotely manage and control up to eight compatible intruder alarm systems. It serves as an upgraded version of previous related applications, offering enhanced functionality for security system oversight.

**Highlights:** Control up to 8 alarm systems, Advanced version, Remote management, Compatible with intruder alarms

**Features:** macOS Compatibility

**In-app purchases:** none


### FSJ

[App page](https://appshunter.io/ios/app/fsj-group/id1606879472)

This app provides real-time tracking and maintenance services through a user-friendly mobile interface. It helps users manage and monitor their assets efficiently.

**Highlights:** Real-time tracking, Maintenance management, User-friendly interface, Mobile access

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Z4 Multi free?

Z4 Multi is free to download, with no in-app purchases.

### Is FSJ free?

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

### Do Z4 Multi or FSJ have ads?

Neither Z4 Multi nor FSJ shows ads.

### Which is updated more often, Z4 Multi or FSJ?

Z4 Multi ships an update every 105 months, and FSJ every 22 months. Most recently, Z4 Multi was updated on October 2, 2026 and FSJ on October 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.*