# Tech English for Developers vs Air

The clearest difference is in-app purchases: Air at none against Tech English for Developers's 1. Air also leads on iOS requirement (13.0 vs 16.6). On price, ads and device support there is nothing between them.

Both are free to download. Tech English for Developers sells 1 one-off in-app purchase. Air asks for nothing beyond the download.

## The numbers

| Metric | Tech English for Developers | Air |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 days | — |
| Size | 59 MB | 69 MB |
| Requires iOS | 16.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [katsuya tamai](https://appshunter.io/developer/1504443936) | [Ranganath Maramraju](https://appshunter.io/developer/1791268742) |

## What reviewers say

### Tech English for Developers

[App page](https://appshunter.io/ios/app/tech-english-for-developers/id6742486115)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 広告非表示（買い切り） | $1.99 | one-time |


### Air

[App page](https://appshunter.io/ios/app/air-purifier/id6746064974)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Tech English for Developers free?

Tech English for Developers is free to download, with in-app purchases available.

### Is Air free?

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

### Do Tech English for Developers or Air have ads?

Neither Tech English for Developers nor Air 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.*