# Kern River Propane vs Mars Rock

The clearest difference is update cadence: Mars Rock at monthly against Kern River Propane's every 4 months. Kern River Propane's advantage is iOS requirement (12.2 vs 15.5). 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.

Kern River Propane ships an update every 4 months, Mars Rock monthly. The most recent releases landed on November 3, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Kern River Propane | Mars Rock |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Monthly** |
| Size | 57 MB | 23 MB |
| Requires iOS | **12.2** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Rural Computer Consultants, Inc.](https://appshunter.io/developer/640795441) | [Xiamen Mars Rock Science Technology Co.,Ltd](https://appshunter.io/developer/1787113189) |

## What reviewers say

### Kern River Propane

[App page](https://appshunter.io/ios/app/kern-river-propane/id1625342521)

**Features:** macOS Compatibility

**In-app purchases:** none


### Mars Rock

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

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kern River Propane free?

Kern River Propane is free to download, with no in-app purchases.

### Is Mars Rock free?

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

### Do Kern River Propane or Mars Rock have ads?

Neither Kern River Propane nor Mars Rock shows ads.

### Which is updated more often, Kern River Propane or Mars Rock?

Kern River Propane ships an update every 4 months, and Mars Rock monthly. Most recently, Kern River Propane was updated on November 3, 2026 and Mars Rock on October 28, 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.*