# Universe Size Comparison vs Intergalactic Solar System

The clearest difference is price: Intergalactic Solar System at Free against Universe Size Comparison's $1.99. Intergalactic Solar System also leads on rating (4.0 vs 3.2) and update cadence (monthly vs every 3 months). Universe Size Comparison's advantage is in-app purchases (none vs 1). On review sentiment, ratings volume, ads and device support there is nothing between them.

Intergalactic Solar System is free to download; Universe Size Comparison costs $1.99 up front. Intergalactic Solar System sells 1 one-off in-app purchase. Universe Size Comparison asks for nothing beyond the download.

Intergalactic Solar System holds the better App Store score, 4.0 against 3.2. Both are backed by a comparable volume of ratings — 30 and 25 respectively. Written reviews split almost evenly too, at 70% and 70% positive.

Universe Size Comparison ships an update every 3 months, Intergalactic Solar System monthly. The most recent releases landed on October 25, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Universe Size Comparison | Intergalactic Solar System |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | [3.2 (30 ratings)](https://appshunter.io/ios/app/universe-size-comparison/id1473946290/reviews) | **[4.0 (25 ratings)](https://appshunter.io/ios/app/intergalactic-solar-system/id1505399254/reviews)** |
| Number of ratings | **30** | 25 |
| Positive reviews | 70.0% of reviews | 70.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 411 MB | 355 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad, Apple TV | iPhone, iPad, iPod |
| Age rating | +4 | 4+ |
| Developer | [Daniele Citi](https://appshunter.io/developer/1187632258) | [Intergalactic Education LLC](https://appshunter.io/developer/1364648815) |

## What reviewers say

### Universe Size Comparison

[App page](https://appshunter.io/ios/app/universe-size-comparison/id1473946290)

Explore the vastness of space and understand celestial body dimensions through interactive 3D comparisons. Discover the scale of planets and stars, from our Sun to hypergiant stars, with guided tours and free comparison modes.

**Highlights:** 3D astronomical comparisons, Tour Mode with guided explanations, Free Mode for custom comparisons, Scale comparisons of planets and stars, Detailed celestial body information, Elegant user interface

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

**In-app purchases:** none


### 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 Universe Size Comparison free?

Universe Size Comparison costs $1.99, with no in-app purchases.

### Is Intergalactic Solar System free?

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

### Which has better reviews, Universe Size Comparison or Intergalactic Solar System?

Intergalactic Solar System is rated higher. Universe Size Comparison averages 3.2 out of 5 from 30 ratings, while Intergalactic Solar System averages 4.0 from 25 ratings.

### Do Universe Size Comparison or Intergalactic Solar System have ads?

Neither Universe Size Comparison nor Intergalactic Solar System shows ads.

### Which is updated more often, Universe Size Comparison or Intergalactic Solar System?

Universe Size Comparison ships an update every 3 months, and Intergalactic Solar System monthly. Most recently, Universe Size Comparison was updated on October 25, 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.*