# Explain 3D vs Intergalactic Solar System

The clearest difference is review sentiment: Intergalactic Solar System at 70% against Explain 3D's 0%. Intergalactic Solar System also leads on rating (4.0 vs 2.7) and update cadence (monthly vs every 5 months). Explain 3D's advantage is iOS requirement (10.0 vs 13.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Explain 3D sells 1 one-off in-app purchase and Intergalactic Solar System sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Intergalactic Solar System holds the better App Store score, 4.0 against 2.7. Both are backed by a comparable volume of ratings — 7 and 25 respectively. Written reviews point the same way: 0% of Explain 3D's written reviews are positive against 70% of Intergalactic Solar System's.

Explain 3D ships an update every 5 months, Intergalactic Solar System monthly. The most recent releases landed on October 13, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Explain 3D | Intergalactic Solar System |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.7 (7 ratings)](https://appshunter.io/ios/app/explain-3d-explore-the-solar-system-free/id1051361866/reviews) | **[4.0 (25 ratings)](https://appshunter.io/ios/app/intergalactic-solar-system/id1505399254/reviews)** |
| Number of ratings | 7 | **25** |
| Positive reviews | 0.0% of reviews | **70.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | **Monthly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 205 MB | 355 MB |
| Requires iOS | **10.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Explain 3D](https://appshunter.io/developer/1019479194) | [Intergalactic Education LLC](https://appshunter.io/developer/1364648815) |

## What reviewers say

### Explain 3D

[App page](https://appshunter.io/ios/app/explain-3d-explore-the-solar-system-free/id1051361866)

Explore the solar system and universe in a 3D environment with realistic models and animations. Learn about planets and spacecrafts, with an option to suggest new simulations. The free version offers basic solar system data, while the full version unlocks more celestial bodies and spacecrafts.

**Highlights:** Interactive 3D environment, Realistic 3D models and animations, Planet and spacecraft descriptions, Engaging educational content, Suggest simulation tool, Full version with expanded content

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock all simulations | $3.99 | one-time |


### 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 |


## Frequently asked questions

### Is Explain 3D free?

Explain 3D is free to download, with in-app purchases available.

### Is Intergalactic Solar System free?

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

### Which has better reviews, Explain 3D or Intergalactic Solar System?

Intergalactic Solar System is rated higher. Explain 3D averages 2.7 out of 5 from 7 ratings, while Intergalactic Solar System averages 4.0 from 25 ratings.

### Do Explain 3D or Intergalactic Solar System have ads?

Neither Explain 3D nor Intergalactic Solar System shows ads.

### Which is updated more often, Explain 3D or Intergalactic Solar System?

Explain 3D ships an update every 5 months, and Intergalactic Solar System monthly. Most recently, Explain 3D was updated on October 13, 2026 and Intergalactic Solar System on October 9, 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.*