# RelativityTheory vs SpaceFold

The clearest difference is price: SpaceFold at Free against RelativityTheory's $0.99. SpaceFold also leads on update cadence (weekly vs every 3 weeks). RelativityTheory's advantage is iOS requirement (14.4 vs 26.0). On ads, in-app purchases and device support there is nothing between them.

SpaceFold is free to download; RelativityTheory costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RelativityTheory ships an update every 3 weeks, SpaceFold weekly. Both last shipped on October 1, 2026.

## The numbers

| Metric | RelativityTheory | SpaceFold |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Weekly** |
| Size | 6 MB | 6 MB |
| Requires iOS | **14.4** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Takao Akatsu](https://appshunter.io/developer/1530946331) | [GALGOTIAS UNIVERSITY,SCHOOL OF BUSINESS](https://appshunter.io/developer/1804867214) |

## What reviewers say

### RelativityTheory

[App page](https://appshunter.io/ios/app/relativitytheory/id1620999874)

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

**In-app purchases:** none


### SpaceFold

[App page](https://appshunter.io/ios/app/spacefold/id6778677783)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RelativityTheory free?

RelativityTheory costs $0.99, with no in-app purchases.

### Is SpaceFold free?

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

### Do RelativityTheory or SpaceFold have ads?

Neither RelativityTheory nor SpaceFold shows ads.

### Which is updated more often, RelativityTheory or SpaceFold?

RelativityTheory ships an update every 3 weeks, and SpaceFold weekly. Most recently, RelativityTheory was updated on October 1, 2026 and SpaceFold on October 1, 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.*