# The Fourth Dimension vs Black Hole Vision

The clearest difference is price: Black Hole Vision at Free against The Fourth Dimension's $2.99. Black Hole Vision also leads on update cadence (every 2 weeks vs every 4 months). The Fourth Dimension's advantage is ratings volume (1.9K vs 24) and device support (3 vs 1). On rating, review sentiment, ads and in-app purchases there is nothing between them.

Black Hole Vision 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.

On the App Store both sit at effectively the same score — 4.8 for The Fourth Dimension against 4.8 for Black Hole Vision. That said, the two scores are not equally well evidenced: The Fourth Dimension has 1.9K ratings behind it against 24, 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 100% of Black Hole Vision's.

The Fourth Dimension ships an update every 4 months, Black Hole Vision every 2 weeks. The most recent releases landed on November 6, 2026 and November 4, 2026 respectively.

## The numbers

| Metric | The Fourth Dimension | Black Hole Vision |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | [4.8 (1.9K ratings)](https://appshunter.io/ios/app/the-fourth-dimension/id504201783/reviews) | **[4.8 (24 ratings)](https://appshunter.io/ios/app/black-hole-vision/id6737292448/reviews)** |
| Number of ratings | **1.9K** | 24 |
| Positive reviews | 94.2% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 5 MB | 64 MB |
| Requires iOS | **15.0** | 17.5 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Lunar Skydiving LLC](https://appshunter.io/developer/504201786) | [Alexandru Lupsasca](https://appshunter.io/developer/1775800348) |

## 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


### Black Hole Vision

[App page](https://appshunter.io/ios/app/black-hole-vision/id6737292448)

Experience the universe through the lens of a black hole. This app simulates how a black hole would warp your camera's view, revealing a photon ring and offering a glimpse into advanced astronomical concepts. Explore the science behind black hole lensing with open-source code and educational resources.

**Highlights:** Live camera feed simulation, Black hole lensing effect, Photon ring visualization, Open-source code available, Educational insights into astrophysics

**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 Black Hole Vision free?

Black Hole Vision is free to download, with no in-app purchases.

### Which has better reviews, The Fourth Dimension or Black Hole Vision?

Black Hole Vision is rated higher. The Fourth Dimension averages 4.8 out of 5 from 1.9K ratings, while Black Hole Vision averages 4.8 from 24 ratings.

### Do The Fourth Dimension or Black Hole Vision have ads?

Neither The Fourth Dimension nor Black Hole Vision shows ads.

### Which is updated more often, The Fourth Dimension or Black Hole Vision?

The Fourth Dimension ships an update every 4 months, and Black Hole Vision every 2 weeks. Most recently, The Fourth Dimension was updated on November 6, 2026 and Black Hole Vision on November 4, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*