# Intergalactic Solar System vs Inside Earth

The clearest difference is rating: Inside Earth at 4.8 against Intergalactic Solar System's 4.0. Inside Earth also leads on in-app purchases (none vs 1) and review sentiment (100% vs 70%). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Intergalactic Solar System sells 1 one-off in-app purchase. Inside Earth asks for nothing beyond the download.

Inside Earth holds the better App Store score, 4.8 against 4.0. Both are backed by a comparable volume of ratings — 25 and 80 respectively. Written reviews point the same way: 70% of Intergalactic Solar System's written reviews are positive against 100% of Inside Earth's.

Intergalactic Solar System ships an update monthly, Inside Earth fortnightly. The most recent releases landed on October 9, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Intergalactic Solar System | Inside Earth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (25 ratings)](https://appshunter.io/ios/app/intergalactic-solar-system/id1505399254/reviews) | **[4.8 (80 ratings)](https://appshunter.io/ios/app/inside-earth-crust-to-core/id1600729183/reviews)** |
| Number of ratings | 25 | **80** |
| Positive reviews | 70.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Fortnightly** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 355 MB | 190 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Intergalactic Education LLC](https://appshunter.io/developer/1364648815) | [Sebastian Andre](https://appshunter.io/developer/1131259796) |

## What reviewers say

### Intergalactic Solar System

[App page](https://appshunter.io/ios/app/intergalactic-solar-system/id1505399254)

Explore planets, moons, and countries in this space simulator mini-game. Learn astronomy and geography aligned with next-generation science standards. Discover the Milky Way galaxy and assess your knowledge through engaging gameplay.

**Highlights:** Planet and moon exploration, Country geography learning, Milky Way galaxy view, Common Core aligned curriculum, Proficiency assessment, Engaging gameplay levels

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access to Full Game | $3.99 | one-time |


### Inside Earth

[App page](https://appshunter.io/ios/app/inside-earth-crust-to-core/id1600729183)

Explore the Earth's interior by virtually peeling back its layers. Understand the composition of the crust, mantle, and core. Learn about tectonic plates, volcanism, and earthquakes.

**Highlights:** Interactive layer peeling, Tectonic plate visualization, Volcanism and earthquake explanation, Compositional learning, Geological process discovery

**In-app purchases:** none


## Frequently asked questions

### Is Intergalactic Solar System free?

Intergalactic Solar System is free to download, with in-app purchases available.

### Is Inside Earth free?

Inside Earth is free to download, with no in-app purchases.

### Which has better reviews, Intergalactic Solar System or Inside Earth?

Inside Earth is rated higher. Intergalactic Solar System averages 4.0 out of 5 from 25 ratings, while Inside Earth averages 4.8 from 80 ratings.

### Do Intergalactic Solar System or Inside Earth have ads?

Neither Intergalactic Solar System nor Inside Earth shows ads.

### Which is updated more often, Intergalactic Solar System or Inside Earth?

Intergalactic Solar System ships an update monthly, and Inside Earth fortnightly. Most recently, Intergalactic Solar System was updated on October 9, 2026 and Inside Earth on October 20, 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.*