# Auction Key vs cAIerra

The clearest difference is in-app purchases: Auction Key at none against cAIerra's 1. Auction Key also leads on device support (3 vs 1). On price, ads and iOS requirement there is nothing between them.

Both are free to download. cAIerra sells 1 in-app purchase, starting at $9.99 per month. Auction Key asks for nothing beyond the download.

## The numbers

| Metric | Auction Key | cAIerra |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 4 days |
| Size | 28 MB | 61 MB |
| Requires iOS | **15.6** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Mouamle Al-Hachami](https://appshunter.io/developer/1832338760) | [TIGRAN GALSTYAN](https://appshunter.io/developer/6785259349) |

## What reviewers say

### Auction Key

[App page](https://appshunter.io/ios/app/auction-key/id6749831089)

**In-app purchases:** none


### cAIerra

[App page](https://appshunter.io/ios/app/caierra/id6790966640)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| cAIerra Monthly | $9.99 | per month |


## Frequently asked questions

### Is Auction Key free?

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

### Is cAIerra free?

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

### Do Auction Key or cAIerra have ads?

Neither Auction Key nor cAIerra 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.*