# Intergalactic Solar System vs GPT Solar System Explorer

The clearest difference is review sentiment: Intergalactic Solar System at 70% against GPT Solar System Explorer's 0%. Intergalactic Solar System also leads on monetization model (free with in-app purchases vs subscription) and iOS requirement (13.0 vs 15.0). GPT Solar System Explorer's advantage is rating (4.7 vs 4.0) and update cadence (every 2 weeks vs monthly). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Intergalactic Solar System sells 1 one-off in-app purchase and GPT Solar System Explorer sells 5 in-app purchases, starting at $5.99 per month. Whichever you choose, the download price is not the number that matters.

GPT Solar System Explorer holds the better App Store score, 4.7 against 4.0. Both are backed by a comparable volume of ratings — 25 and 90 respectively. Written reviews complicate that: 70% of Intergalactic Solar System's written reviews are positive against 0% of GPT Solar System Explorer's, so the app with the better star average is not the one people write more warmly about.

Intergalactic Solar System ships an update monthly, GPT Solar System Explorer every 2 weeks. The most recent releases landed on September 22, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | Intergalactic Solar System | GPT Solar System Explorer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.0 (25 ratings)](https://appshunter.io/ios/app/intergalactic-solar-system/id1505399254/reviews) | **[4.7 (90 ratings)](https://appshunter.io/ios/app/gpt-solar-system-explorer/id6743086286/reviews)** |
| Number of ratings | 25 | **90** |
| Positive reviews | **70.0% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 2 weeks** |
| Monetization | **Free with in-app purchases** | Subscription |
| Size | 355 MB | 288 MB |
| Requires iOS | **13.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Intergalactic Education LLC](https://appshunter.io/developer/1364648815) | [Apic Ways](https://appshunter.io/developer/1635604961) |

## 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 |


### GPT Solar System Explorer

[App page](https://appshunter.io/ios/app/gpt-solar-system-explorer/id6743086286)

Explore our Solar System in an interactive 3D environment powered by AI. Discover stunning images and videos from space agencies, and ask your AI guide anything about the cosmos. Perfect for curious minds of all ages.

**Highlights:** Interactive 3D Solar System model, AI-powered cosmic guide, NASA, SpaceX, ESA imagery & videos, Planet and mission details, Voice-activated Q&A, Intuitive controls for all ages

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Subscription | $5.99 | per month |
| Monthly Super Pro Subscription | $19.99 | per month |
| Monthly Ultra Pro Subscription | $29.99 | per month |
| Yearly Pro Subscription | $39.99 | per year |
| AI coins | $5.99 | one-time |


## Frequently asked questions

### Is Intergalactic Solar System free?

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

### Is GPT Solar System Explorer free?

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

### Which has better reviews, Intergalactic Solar System or GPT Solar System Explorer?

GPT Solar System Explorer is rated higher. Intergalactic Solar System averages 4.0 out of 5 from 25 ratings, while GPT Solar System Explorer averages 4.7 from 90 ratings.

### Do Intergalactic Solar System or GPT Solar System Explorer have ads?

Neither Intergalactic Solar System nor GPT Solar System Explorer shows ads.

### Which is updated more often, Intergalactic Solar System or GPT Solar System Explorer?

Intergalactic Solar System ships an update monthly, and GPT Solar System Explorer every 2 weeks. Most recently, Intergalactic Solar System was updated on September 22, 2026 and GPT Solar System Explorer on September 21, 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.*