# Mars Rock E vs Austa Smart

The clearest difference is iOS requirement: Austa Smart at 12.0 against Mars Rock E's 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.

## The numbers

| Metric | Mars Rock E | Austa Smart |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | — |
| Size | 22 MB | 28 MB |
| Requires iOS | 15.5 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 17+ |
| Developer | [Xiamen Mars Rock Science Technology Co.,Ltd](https://appshunter.io/developer/1787113189) | [Ningbo Osda Solar Co., Ltd.](https://appshunter.io/developer/1696929762) |

## What reviewers say

### Mars Rock E

[App page](https://appshunter.io/ios/app/mars-rock-e/id6739800863)

**Features:** macOS Compatibility

**In-app purchases:** none


### Austa Smart

[App page](https://appshunter.io/ios/app/austa-smart/id6743460819)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Mars Rock E free?

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

### Is Austa Smart free?

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

### Do Mars Rock E or Austa Smart have ads?

Neither Mars Rock E nor Austa Smart shows ads.

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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.*