Comparison

Mars Rock vs FieldBus Toolkit

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

Head to head

About

Mars Rock

Features

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Mars Rock Group is a global innova endurance,and continuous evolution qualities that resonate throughou and more sustainable home. Mars Rock Group have established the following busi inverters, controllers, energy storage, and water pump

About

FieldBus Toolkit

Features

Read full description

FieldBus Toolkit is the essential utility for embedded engineers and PLC programmers. Debug Modbus TCP, MQTT, HTTP, and socket communications directly from your mobile device. [Key Features] 1. Multi-Protocol Support - Modbus TCP Client - MQTT Client (Publish/Subscribe) - HTTP REST Client (GET, POST, PUT, DELETE) - TCP/UDP Client & Server (Echo/Broadcast) 2. Data Visualization - Send and receive data in ASCII or HEX format. - Real-time communication logs. 3. Efficiency Tools - Save frequently used commands as Macros for quick access. - One-touch data transmission. 4. Developer Friendly - Perfect for testing Arduino, ESP32, Raspberry Pi, and industrial PLCs.

Screenshots

Mars Rock3 screens

FieldBus Toolkit4 screens

Verdict

The call

The clearest difference is in-app purchases: Mars Rock at none against FieldBus Toolkit's 1. Mars Rock also leads on ads (none vs shown) and update cadence (monthly vs every 3 months). On price, device support and iOS requirement 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. FieldBus Toolkit sells 1 one-off in-app purchase. Mars Rock asks for nothing beyond the download.

UpkeepUpdate frequency

Mars Rock ships an update monthly, FieldBus Toolkit every 3 months. The most recent releases landed on October 8, 2026 and October 24, 2026 respectively.

Scorecard3 real differences · 3 level

Mars Rock versus FieldBus Toolkit: the parameters behind the verdict, then further details
Parameter	Mars Rock	FieldBus Toolkit
Price	Free	Free
Update frequency	Monthly — better	Every 3 months
Ads	No — better	Yes
In-app purchases	No — better	Yes
Devices	iPhone, iPad, iPod	iPhone, iPad, iPod
Requires iOS	15.5	15.0 — better
Further details — not scored
Size	23 MB	28 MB
Age rating	17+	4+
Developer	Xiamen Mars Rock Science Technology Co.,Ltd	DONGSOO LEE

In-app purchases

None

Mars Rock

No in-app purchases

1 purchases

FieldBus Toolkit

One-time1

Remove Ads$1.99

Questions

Is Mars Rock free?

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

Is FieldBus Toolkit free?

FieldBus Toolkit is free to download, with in-app purchases available.

Do Mars Rock or FieldBus Toolkit have ads?

FieldBus Toolkit shows ads; Mars Rock does not.

Which is updated more often, Mars Rock or FieldBus Toolkit?

Mars Rock ships an update monthly, and FieldBus Toolkit every 3 months. Most recently, Mars Rock was updated on October 8, 2026 and FieldBus Toolkit on October 24, 2026.