# Mars Rock E vs Moon Phases

The clearest difference is in-app purchases: Mars Rock E at none against Moon Phases's 1. Mars Rock E also leads on ads (none vs shown) and iOS requirement (15.5 vs 18.0). On price, update cadence and device support there is nothing between them.

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

Both ship on a similar rhythm, roughly monthly. The most recent releases landed on October 3, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Mars Rock E | Moon Phases |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Monthly | Monthly |
| Size | 22 MB | 35 MB |
| Requires iOS | **15.5** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Xiamen Mars Rock Science Technology Co.,Ltd](https://appshunter.io/developer/1787113189) | [Pocket Grove Ltd](https://appshunter.io/developer/954373766) |

## What reviewers say

### Mars Rock E

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Moon Phases

[App page](https://appshunter.io/ios/app/moon-phases-lunar-tracker/id6760960352)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Moon Phases Pro | $2.99 | one-time |


## Frequently asked questions

### Is Mars Rock E free?

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

### Is Moon Phases free?

Moon Phases is free to download, with in-app purchases available.

### Do Mars Rock E or Moon Phases have ads?

Moon Phases shows ads; Mars Rock E does not.

### Which is updated more often, Mars Rock E or Moon Phases?

Mars Rock E ships an update monthly, and Moon Phases monthly. Most recently, Mars Rock E was updated on October 3, 2026 and Moon Phases 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.*