# Door Data Systems vs Air2Air

The clearest difference is iOS requirement: Air2Air at 12.4 against Door Data Systems's 15.1. 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 | Door Data Systems | Air2Air |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 40 MB | 24 MB |
| Requires iOS | 15.1 | **12.4** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Door Data Systems](https://appshunter.io/developer/1530827741) | [Boom Software](https://appshunter.io/developer/1605457422) |

## What reviewers say

### Door Data Systems

[App page](https://appshunter.io/ios/app/door-data-systems/id1538987604)

**Features:** Vision Pro support

**In-app purchases:** none


### Air2Air

[App page](https://appshunter.io/ios/app/air2air/id6499154838)

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

**In-app purchases:** none


## Frequently asked questions

### Is Door Data Systems free?

Door Data Systems is free to download, with no in-app purchases.

### Is Air2Air free?

Air2Air is free to download, with no in-app purchases.

### Do Door Data Systems or Air2Air have ads?

Neither Door Data Systems nor Air2Air 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.*