# Professor Maxwell’s 4D Galaxy vs VR Universe

The clearest difference is rating: VR Universe at 4.1 against Professor Maxwell’s 4D Galaxy's 2.6. VR Universe also leads on review sentiment (60% vs 41%). Professor Maxwell’s 4D Galaxy's advantage is iOS requirement (9.5 vs 11.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

VR Universe holds the better App Store score, 4.1 against 2.6. Both are backed by a comparable volume of ratings — 33 and 30 respectively. Written reviews point the same way: 41% of Professor Maxwell’s 4D Galaxy's written reviews are positive against 60% of VR Universe's.

Professor Maxwell’s 4D Galaxy ships an update every 8 months, VR Universe every 5 months. The most recent releases landed on October 22, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Professor Maxwell’s 4D Galaxy | VR Universe |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.6 (33 ratings)](https://appshunter.io/ios/app/professor-maxwells-4d-galaxy/id1451237448/reviews) | **[4.1 (30 ratings)](https://appshunter.io/ios/app/vr-universe/id1516894338/reviews)** |
| Number of ratings | **33** | 30 |
| Positive reviews | 40.6% of reviews | **60.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 8 months | **Every 5 months** |
| Monetization | Free | Free |
| Size | 852 MB | 1.2 GB |
| Requires iOS | **9.5** | 11.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Spicebox](https://appshunter.io/developer/1348931384) | [Abacus](https://appshunter.io/developer/1486425022) |

## What reviewers say

### Professor Maxwell’s 4D Galaxy

[App page](https://appshunter.io/ios/app/professor-maxwells-4d-galaxy/id1451237448)

Explore space science through interactive augmented and virtual reality projects. Build models, walk on the moon, and discover planets and Earth's layers with engaging, lifelike experiences.

**Highlights:** Augmented Reality (AR) experiences, Virtual Reality (VR) experiences, 20 interactive science projects, Build a Sundial, Explore Solar System planets, Discover Earth's layers, Walk on the Moon surface

**Features:** macOS Compatibility

**In-app purchases:** none


### VR Universe

[App page](https://appshunter.io/ios/app/vr-universe/id1516894338)

Explore the universe with interactive augmented and virtual reality experiences. Learn about space, planets, and the International Space Station through hands-on projects like building a planetarium and launching a rocket. Bring educational content to life by holding your device over a special book.

**Highlights:** Augmented and virtual reality experiences, Interactive space exploration, Hands-on science projects, Learn about planets and the solar system, Bring educational content to life

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Professor Maxwell’s 4D Galaxy free?

Professor Maxwell’s 4D Galaxy is free to download, with no in-app purchases.

### Is VR Universe free?

VR Universe is free to download, with no in-app purchases.

### Which has better reviews, Professor Maxwell’s 4D Galaxy or VR Universe?

VR Universe is rated higher. Professor Maxwell’s 4D Galaxy averages 2.6 out of 5 from 33 ratings, while VR Universe averages 4.1 from 30 ratings.

### Do Professor Maxwell’s 4D Galaxy or VR Universe have ads?

Neither Professor Maxwell’s 4D Galaxy nor VR Universe shows ads.

### Which is updated more often, Professor Maxwell’s 4D Galaxy or VR Universe?

Professor Maxwell’s 4D Galaxy ships an update every 8 months, and VR Universe every 5 months. Most recently, Professor Maxwell’s 4D Galaxy was updated on October 22, 2026 and VR Universe 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.*