# quantum error correction 2 vs EigenAlpha

The clearest difference is in-app purchases: quantum error correction 2 at none against EigenAlpha's 1. quantum error correction 2 also leads on iOS requirement (16.0 vs 26.2). On price, ads and device support there is nothing between them.

Both are free to download. EigenAlpha sells 1 one-off in-app purchase. quantum error correction 2 asks for nothing beyond the download.

## The numbers

| Metric | quantum error correction 2 | EigenAlpha |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 6 MB | 7 MB |
| Requires iOS | **16.0** | 26.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Sungjun Kim](https://appshunter.io/developer/1602461985) | [JT Scientific Consulting LLC](https://appshunter.io/developer/1612699648) |

## What reviewers say

### quantum error correction 2

[App page](https://appshunter.io/ios/app/quantum-error-correction-2/id6505033728)

**Features:** macOS Compatibility

**In-app purchases:** none


### EigenAlpha

[App page](https://appshunter.io/ios/app/eigenalpha/id6772005828)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Unlock | $12.99 | one-time |


## Frequently asked questions

### Is quantum error correction 2 free?

quantum error correction 2 is free to download, with no in-app purchases.

### Is EigenAlpha free?

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

### Do quantum error correction 2 or EigenAlpha have ads?

Neither quantum error correction 2 nor EigenAlpha 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.*