# The Fourth Dimension vs Crystal Flight

The clearest difference is price: Crystal Flight at Free against The Fourth Dimension's $2.99. Crystal Flight also leads on rating (5.0 vs 4.8). The Fourth Dimension's advantage is ratings volume (1.9K vs 1) and iOS requirement (12.0 vs 17.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Crystal Flight is free to download; The Fourth Dimension costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Crystal Flight holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: The Fourth Dimension has 1.9K ratings behind it against 1, so its average is the more settled of the two.

The Fourth Dimension ships an update every 4 months, Crystal Flight every 5 months. The most recent releases landed on September 23, 2026 and July 5, 2026 respectively.

## The numbers

| Metric | The Fourth Dimension | Crystal Flight |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.8 (1.9K ratings)](https://appshunter.io/ios/app/the-fourth-dimension/id504201783/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/crystal-flight/id1436396839/reviews)** |
| Number of ratings | **1.9K** | 1 |
| Positive reviews | 94.2% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 5 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 4 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Lunar Skydiving LLC](https://appshunter.io/developer/504201786) | [Jeff Weeks](https://appshunter.io/developer/326104308) |

## 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


### Crystal Flight

[App page](https://appshunter.io/ios/app/crystal-flight/id1436396839)

Experience free flight within diverse crystal environments. Navigate your journey by simply tilting your iPhone or iPad to control direction.

**Highlights:** Free flight simulation, Crystal environments, Tilt-to-navigate controls, iPhone and iPad support

**In-app purchases:** none


## Frequently asked questions

### Is The Fourth Dimension free?

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

### Is Crystal Flight free?

Crystal Flight is free to download, with no in-app purchases.

### Which has better reviews, The Fourth Dimension or Crystal Flight?

Crystal Flight is rated higher. The Fourth Dimension averages 4.8 out of 5 from 1.9K ratings, while Crystal Flight averages 5.0 from 1 ratings.

### Do The Fourth Dimension or Crystal Flight have ads?

Neither The Fourth Dimension nor Crystal Flight shows ads.

### Which is updated more often, The Fourth Dimension or Crystal Flight?

The Fourth Dimension ships an update every 4 months, and Crystal Flight every 5 months. Most recently, The Fourth Dimension was updated on September 23, 2026 and Crystal Flight on July 5, 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.*