# iRelativity vs The Einstein Archive

The clearest difference is iOS requirement: The Einstein Archive at 15.1 against iRelativity's 18.6. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | iRelativity | The Einstein Archive |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Size | 1 MB | 48 MB |
| Requires iOS | 18.6 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Vladimir Kostadinov Stoyanov](https://appshunter.io/developer/1776235767) | [Felicity Enterprises LLC](https://appshunter.io/developer/1883166758) |

## What reviewers say

### iRelativity

[App page](https://appshunter.io/ios/app/irelativity/id6776330770)

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

**In-app purchases:** none


### The Einstein Archive

[App page](https://appshunter.io/ios/app/the-einstein-archive/id6804042319)

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

**In-app purchases:** none


## Frequently asked questions

### Is iRelativity free?

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

### Is The Einstein Archive free?

The Einstein Archive is free to download, with no in-app purchases.

### Do iRelativity or The Einstein Archive have ads?

Neither iRelativity nor The Einstein Archive shows ads.

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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.*