Comparison

Z4 Multi vs FSJ

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head

FSJ-Group

★ 4.116 ratingsView app →

About

Z4 Multi

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

Read full description

This is the advanced version of our Z4 Ultra & Z4 Farsi apps. You could control up to 8 compatible intruder alarm systems with this app.

About

FSJ

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

Read full description

Fsj is a real-time tracking and maintenance application with user friendly mobile interface

Screenshots

Z4 Multi3 screens

FSJ4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

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.

Scorecard1 real difference · 9 level

Z4 Multi versus FSJ: the parameters behind the verdict, then further details
Parameter	Z4 Multi	FSJ
Price	Free	Free
Rating	—	4.1 (16 ratings) — better
Positive reviews	0.0% of reviews	0.0% of reviews
Number of ratings	—	16 — better
Update frequency	Every 105 months	Every 22 months — better
Ads	No	No
In-app purchases	No	No
Monetization	Free	Free
Devices	iPhone, iPod	iPhone, iPod
Requires iOS	12.0 — better	12.4
Further details — not scored
Size	5 MB	70 MB
Age rating	4+	4+
Developer	M S Dehkordi	Mahdiyeh Khodaparastan

Customer experience

Z4 Multi

Written reviews1 reviews

Positive0.0%

Neutral100.0%

Negative0.0%

FSJ

All ratings16 ratings

Positive75.0%

Neutral6.3%

Negative18.8%

Written reviews2 reviews

Positive0.0%

Neutral0.0%

Negative100.0%

In-app purchases

None

Z4 Multi

No in-app purchases

None

FSJ

No in-app purchases

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.