# Mars Rock vs FieldBus Toolkit

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.

Both are free to download. FieldBus Toolkit sells 1 one-off in-app purchase. Mars Rock asks for nothing beyond the download.

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.

## The numbers

| Metric | Mars Rock | FieldBus Toolkit |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Monthly** | Every 3 months |
| Size | 23 MB | 28 MB |
| Requires iOS | 15.5 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Xiamen Mars Rock Science Technology Co.,Ltd](https://appshunter.io/developer/1787113189) | [DONGSOO LEE](https://appshunter.io/developer/1868670088) |

## What reviewers say

### Mars Rock

[App page](https://appshunter.io/ios/app/mars-rock/id6739800801)

**Features:** macOS Compatibility

**In-app purchases:** none


### FieldBus Toolkit

[App page](https://appshunter.io/ios/app/fieldbus-toolkit/id6758210279)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


## Frequently asked 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.

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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.*