# ZeroOneFlow vs Four Dimensional Space

The clearest difference is in-app purchases: Four Dimensional Space at none against ZeroOneFlow's 1. ZeroOneFlow's advantage is update cadence (every 3 weeks vs every 6 months) and iOS requirement (16.2 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. ZeroOneFlow sells 1 one-off in-app purchase. Four Dimensional Space asks for nothing beyond the download.

ZeroOneFlow ships an update every 3 weeks, Four Dimensional Space every 6 months. Both last shipped on October 25, 2026.

## The numbers

| Metric | ZeroOneFlow | Four Dimensional Space |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 6 months |
| Size | 1 MB | 6 MB |
| Requires iOS | **16.2** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Fu Ni](https://appshunter.io/developer/1560534229) | [Toru Kawaguchi](https://appshunter.io/developer/1063198642) |

## What reviewers say

### ZeroOneFlow

[App page](https://appshunter.io/ios/app/zerooneflow/id1563516711)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tornado | $0.99 | one-time |


### Four Dimensional Space

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

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

**In-app purchases:** none


## Frequently asked questions

### Is ZeroOneFlow free?

ZeroOneFlow is free to download, with in-app purchases available.

### Is Four Dimensional Space free?

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

### Do ZeroOneFlow or Four Dimensional Space have ads?

Neither ZeroOneFlow nor Four Dimensional Space shows ads.

### Which is updated more often, ZeroOneFlow or Four Dimensional Space?

ZeroOneFlow ships an update every 3 weeks, and Four Dimensional Space every 6 months. Most recently, ZeroOneFlow was updated on October 25, 2026 and Four Dimensional Space on October 25, 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.*