# Four Dimensional Space vs Black Hole Sun

The clearest difference is price: Four Dimensional Space at Free against Black Hole Sun's $0.99. Black Hole Sun's advantage is ads (none vs shown) and device support (5 vs 2). On update cadence, in-app purchases and iOS requirement there is nothing between them.

Four Dimensional Space is free to download; Black Hole Sun costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 28, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Four Dimensional Space | Black Hole Sun |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | Every 3 months |
| Size | 6 MB | 2.3 GB |
| Requires iOS | 26.2 | **26.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac, Apple TV, Vision Pro** |
| Age rating | 4+ | 4+ |
| Developer | [Toru Kawaguchi](https://appshunter.io/developer/1063198642) | [Pieter Hartzenberg](https://appshunter.io/developer/495577297) |

## What reviewers say

### Four Dimensional Space

[App page](https://appshunter.io/ios/app/four-dimensional-space/id6762447300)

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

**In-app purchases:** none


### Black Hole Sun

[App page](https://appshunter.io/ios/app/black-hole-sun/id6787686882)

**Features:** iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is Four Dimensional Space free?

Four Dimensional Space is free to download, with no in-app purchases.

### Is Black Hole Sun free?

Black Hole Sun costs $0.99, with no in-app purchases.

### Do Four Dimensional Space or Black Hole Sun have ads?

Four Dimensional Space shows ads; Black Hole Sun does not.

### Which is updated more often, Four Dimensional Space or Black Hole Sun?

Four Dimensional Space ships an update every 3 months, and Black Hole Sun every 3 months. Most recently, Four Dimensional Space was updated on October 28, 2026 and Black Hole Sun on November 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.*