# The Fourth Dimension vs Univerzoom 3D

The clearest difference is monetization model: Univerzoom 3D at free against The Fourth Dimension's free with in-app purchases. Univerzoom 3D also leads on update cadence (every 2 months vs every 4 months). The Fourth Dimension's advantage is ratings volume (1.9K vs 289) and iOS requirement (12.0 vs 15.0). On price, rating, review sentiment and ads there is nothing between them.

The Fourth Dimension costs $2.99 and Univerzoom 3D $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

On the App Store both sit at effectively the same score — 4.8 for The Fourth Dimension against 4.8 for Univerzoom 3D. That said, the two scores are not equally well evidenced: The Fourth Dimension has 1.9K ratings behind it against 289, so its average is the more settled of the two. Written reviews are what separate them: 94% of The Fourth Dimension's written reviews are positive against 97% of Univerzoom 3D's.

The Fourth Dimension ships an update every 4 months, Univerzoom 3D every 2 months. The most recent releases landed on October 24, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | The Fourth Dimension | Univerzoom 3D |
| --- | --- | --- |
| Price | $2.99 | $2.99 |
| Rating | **[4.8 (1.9K ratings)](https://appshunter.io/ios/app/the-fourth-dimension/id504201783/reviews)** | [4.8 (289 ratings)](https://appshunter.io/ios/app/univerzoom-3d-explore-scale/id1552648156/reviews) |
| Number of ratings | **1.9K** | 289 |
| Positive reviews | 94.2% of reviews | **97.3% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 255 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lunar Skydiving LLC](https://appshunter.io/developer/504201786) | [Linda Schnetzinger](https://appshunter.io/developer/1479825448) |

## What reviewers say

### The Fourth Dimension

[App page](https://appshunter.io/ios/app/the-fourth-dimension/id504201783)

Explore a complex mathematical concept through an interactive 3D experience. This app uses a unique touch interface to help you visualize and understand the fourth dimension in an engaging and accessible way.

**Highlights:** Interactive 3D touch interface, Explains the fourth dimension, Accessible language for all, 30-page interactive book, Visual and hands-on learning

**In-app purchases:** none


### Univerzoom 3D

[App page](https://appshunter.io/ios/app/univerzoom-3d-explore-scale/id1552648156)

Explore the vastness of the universe and the intricacies of the microcosmos with intuitive touch controls. Compare celestial bodies, everyday objects, and subatomic particles to grasp their true scale. Discover fascinating facts and learn about the cosmos and beyond.

**Highlights:** Intuitive gesture-based scaling, Explore universe to atomic levels, Compare sizes of diverse objects, Learn facts about celestial bodies, Text-to-Speech for facts, External resource links

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is The Fourth Dimension free?

The Fourth Dimension costs $2.99, with no in-app purchases.

### Is Univerzoom 3D free?

Univerzoom 3D costs $2.99, with no in-app purchases.

### Which has better reviews, The Fourth Dimension or Univerzoom 3D?

The Fourth Dimension is rated higher. The Fourth Dimension averages 4.8 out of 5 from 1.9K ratings, while Univerzoom 3D averages 4.8 from 289 ratings.

### Do The Fourth Dimension or Univerzoom 3D have ads?

Neither The Fourth Dimension nor Univerzoom 3D shows ads.

### Which is updated more often, The Fourth Dimension or Univerzoom 3D?

The Fourth Dimension ships an update every 4 months, and Univerzoom 3D every 2 months. Most recently, The Fourth Dimension was updated on October 24, 2026 and Univerzoom 3D on October 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.*