# XI Alpha Lambda vs Alpha PS

The clearest difference is iOS requirement: Alpha PS at 11.0 against XI Alpha Lambda's 15.6. 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 | XI Alpha Lambda | Alpha PS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 49 months | — |
| Size | 21 MB | 48 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 17+ | 12+ |
| Developer | [Ricardo Cumberbatch](https://appshunter.io/developer/1455104172) | [Parabolic Surf, LLC](https://appshunter.io/developer/1610548236) |

## What reviewers say

### XI Alpha Lambda

[App page](https://appshunter.io/ios/app/xi-alpha-lambda/id1585350419)

**Features:** macOS Compatibility

**In-app purchases:** none


### Alpha PS

[App page](https://appshunter.io/ios/app/alpha-ps/id6444811831)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is XI Alpha Lambda free?

XI Alpha Lambda is free to download, with no in-app purchases.

### Is Alpha PS free?

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

### Do XI Alpha Lambda or Alpha PS have ads?

Neither XI Alpha Lambda nor Alpha PS 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.*